1. Mr Smith ________ (go) to Suzhou two years ago.

2. Jack ________ (learn) English now.

3. Did she ________ (buy) that book yesterday?

4. There are lots of ________ (bus) on the street.

5. Thank you for ________ (talk) to me.

【答案】1. went 2. is learning 3. buy 4. buses 5. talking

【解析】

略