【题目】My bike didn’t work this morning, so I had no choice but to school.

【题目】My daughter practices ________ the piano for at least an hour every day.

【题目】Students ________ be careful when they do chemical experiments in the lab.

【题目】I knocked on the door several times but answered, so I left.

【题目】Last month, Tom’s uncle died ______ lung cancer (肺癌) at the age of 48. He was very sad.

【题目】If you don’t know how to do it, you can ask your teacher help.

【题目】It was dark and began to rain heavily I got home.

【题目】I have new friend, and name is Jim.

【题目】Look! The lady over there is ______ university teacher.

【题目】—Big news! Tu Youyou succeeded Nobel Prize in medicine last month.