31. The last time we went to Ho Chi Minh City was in 2009.→We haven’t.................................................................................................................
32. I started playing tennis 2 years ago.→I have.........................................................................................................................
.33. I last visited Tom 3 months ago.→I haven’t......................................................................................................................
→It’s ...............................................................................................................................
→The last .......................................................................................................................
34. I started doing homework two hours ago.→I have .........................................................................................................................
35. I started working in this company when I came back from Paris.→ I have .........................................................................................................................
36.I started writing this novel 3 months ago. (for)→Ihave.........................................................................................................................
37.She has been playing the piano since she came back from school. (when)→Shebegan..........................................................................................................
38. We bought our house 10 years ago.→ Our house...................................................................................................................
39. They have considered me as their great friend.→I............................................................................................................................
40. My sister began to learn English when she was six years old.→My sister has.......................................................................................................