9. At first I regretted them to stay, but we soon became great friends.
A. to invite B. invited
C. to have invited D. inviting
9. D考查非谓语动词。句意：起初，我后悔邀请他们留下来， 但是我们很快成了好朋友。regret doing sth后悔做了某事； regret to do sth遗憾（将要）做某事。根据句意可知，invite这个动作已经发生，故regret后应该用动名词，故选D。
题目来源：2015全品语法快练高中英语新课标 > 训练28动词变化类综合训练
科目：高中英语 来源： 题型：
C
Now, we know that if we do not get enough vitamins, we are at the risk of devel?oping a number of diseases. As a result, vita?min supplements(补品)，though expensive, are popular with people who worry that they are not get?ting enough vitamins from the foods they eat. But contrary to what many people think,medical experts have found lit?tle evidence that most supplements do anything to improve health or protect against diseases.
In fact, medical experts warn that taking too many of some vitamins can be harmful. For example*too much vita?min E can cause bleeding. People should discuss what vita?mins they take with their doctors, as some vitamins can produce harmful side effects when mixed with medicines.
Experts, however, do say that sometimes vitamins can help prevent diseases. People who know they lack a particular vitamin should take vitamin supplements. Some older adults, for example, may not have enough vitamin twelve. This is because, as people get older, their body loses its ability to take it from foods. Also, people who spend much time in?side may need some extra vitamin D as the skin makes this vitamin from sunlight.
Different vitamins are found in different foods. Vita?min A is found in fish liver oil. It's also in the yellow part of eggs. Sweet potatoes, carrots and other darkly coloured fruit and vegetables contain substances that the body can change into vitamin A. Vitamin B-twelve is found in green leafy vegetables and other foods, like fruit. Vitamin K can be found in pork products.
In fact, for most people, a balanced diet can ensure enough vitamins our bodies need. So,it is important for us to eat a mixture of foods every day to ensure that we get enough vitamins.
24. What is probably talked about before this passage?
A. How many vitamins a person's body needs.
B. How many vitamins some foods contain.
C. The benefits that vitamins bring to our health.
D. What people should do to stay healthy.
25. From the passage, we can learn that medical experts advise people .
A. never to take any vitamin supplements
B. to depend only on food for their vitamins
C. not to take any vitamins together with medicines
D. to consult doctors before taking vitamin supple?ments
26. What would be the best title of the passage?
A. Getting enough vitamins through a balanced diet
B. Vitamin supplements do harm to our health
C. Vitamins are important to our health
D. Lacking vitamins can cause many diseases
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科目：高中英语 来源： 题型：
4. If he had spent more time practising speaking English before, he able to speak it much better now.
A. will be B. would be
C. has been D. would have been
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科目：高中英语 来源： 题型：
14. It for the whole week. The city will be flooded if it soon.
A. rained; won't stop
B. has been raining; doesn't stop
C. has rained ； won't stop
D. rained ； doesn't stop
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科目：高中英语 来源： 题型：
20. ―Why were you so late for work today?
― to the office was very slow this morning because of the traffic.
A. Driving B. I drove
C. To drive D. That I drove
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科目：高中英语 来源： 题型：
14. The movie originally for children under 12 is now being used to educate adults.
A. intended B. being intended
C. to be intended D. having been intended
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科目：高中英语 来源： 题型：
4. 实际情况是天气不遂人意，这是我们推迟了校运会的原因。
______________ the weather went against our will, which ________________why we put off the school sports meeting.(表语从句；account for)
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