13.　 Listen！The girls 　　　　(sing) in the next room.

12.　 March 　　　　(come) after February.

11.　 Look, the boys 　　　　(sit) quietly.

10.　 Ben and his cousin 　　　　(catch) some insects in the park yesterday.

9.　　　 They 　　　　　(live) in a small town last year, but this year, they 　　　(move) to a city.

8.　　　 He 　　　　(see) a ten-yuan note on the ground just now.

7.　　　 Who 　　　　　(teach) you Chinese this term? Mr Green.

6.　　　 Don’t talk. We 　　　　(have) a lesson.

5.　　　 There 　　　　　(be) any sweets in the bag, but they 　　　　　(be) there a moment ago.

4.　　　 What day 　　　　(be) it yesterday?