31, Our teacher (tell) _________ us yesterday that he (visit)________ Singapore in 2010
32, Geogre (work)__________ at the university so far
33, When he lived in Manchester, he (work)________ in a bank
34, Birds (build)_________ their nests in summer and (fly)_________ to the South in winter
35, I (lose)_________ my key. (can)______ you help me look for it?
36, My father (not smoke) _________ for five years
37, My teacher wasn’t at home when I (arrive)________________. He (just go) _____________ out
38, How long Bob and Mary (be) _________ married?
39, You (receive) _________ any letter from your parents yet?
40, My brother (join)____________ the army when he (be)__________ young.
31, Our teacher (tell) told us yesterday that he (visit) visited Singapore in 2010.
32, Geogre (work) has worked at the university so far.
33. When he lived in Manchester, he (work) worked in a bank.
34, Birds (build) build their nests in summer and (fly) fly to the South in winter.
35, I (lose) lost my key. (can) Can you help me look for it?
36, My father (not smoke) hasn’t smoked for five years.
37, My teacher wasn’t at home when I (arrive) arrived. He (just go) had just gone out.
38, How long Bob and Mary (be) have been married?
39, Have you (receive) received any letter from your parents yet?
40, My brother (join) joined the army when he (be) was young.
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31. told…had visted
32. has worked
33. worked
34. build…fly
35. have lost… Can
36. hasn’t smoked
37. arrived … had just gone
38. have Bob and Marry been
39. Have you reveived
40. joined… was