Chọn đáp án đúng
1. I........ phone her if I knew her number.
A. would B. have to C. will D. shall
2. Nobody went to the party,...........?
A. does he B. do they C. didn't they D. did they
3. The childen laughed......... when they are watching a comic
A. happyily B. happy C. happiness D. unhappy
4. Let's............ about pollution problem.
A. to talk B. talking C. talk D. talked