Chọn đáp án đúng

----- Nội dung dịch tự động từ ảnh -----
A. It's nice of you to say so
C. Oh, well done!
13. They often went to school by bike when they were young.
A. They used go to school by bike when they were young.
C. They used to go to school by bike when they were young.
14. A dripping faucet
A. can waste B. is wasted
15. He sighed
B. Shall I? Thanks.
D. I feel interesting to hear that.
B. They used to going to school by bike when they were young.
D. They used to went to school by bike when they were young.
500 liters of water a month.
C. waste
when he heard the news.
D. are wasting