【题目】Scientists ______ thousands of chemicals before they decided on the right one in the end.

【题目】During my last winter holiday, I went to countryside with my father to visit my grandparents. I find a change there. The first time I went there, they were living in a small house with dogs, ducks, and another animals. Last winter when I went here again, they had a big separate house to raise dozens of chicken. They also had a small pond, which they raised fish. My grandpa said last summer they earned quite a lot by sell the fish. I felt happily that their life had improved. At the end of our trip, I told my father that I planned to return for every two years, but he agreed.

【题目】假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文，文中共有10处语言错误，每句中最多有两处，每处错误仅涉及一个单词的增加、删改或修改。

【题目】Restaurants in every corner of Tianjin not only provide job opportunities but ______ lots of taxes.

【题目】--- Let’s go to Tianjin Music Hall. The soft music makes me relaxed.

【题目】When I was little, Friday’s night was our family game night. After supper, we would play card games of all sort in the sitting room. As the kid, I loved to watch cartoons, but no matter how many times I asked to watching them, my parents would not to let me. They would say to us that playing card games would help my brain. Still I unwilling to play the games for them sometimes. I didn’t realize how right my parents are until I entered high school. The games my parents taught me where I was a child turned out to be very useful later in my life.

【题目】在英语课堂上，老师要求同学们根据下面的两幅图画轮流发言。请准备一篇发言稿，内容包括：

【题目】Father made a promise ______ I passed the exam, he would buy me a PS4.

【题目】No driving after drinking is a rule that every driver ______ obey in our country.

【题目】The computer course, ____ last year, is very popular among the students in this school.