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30. ...aspects of learning English do you find the most difficult?

A. What B. Where C. When D. While

31. We have many well …… teachers here.

A. qualify B. quality C. qualified D. qualification


 
32. They ……. in that house for several months.

A. live B. lived C. have lived D. are living

33. My father ……teaching in a small village 10 years ago

A. starts B. started C. has started D. is starting

34. We have lived in Hanoi …….. 4 years

A. in B. since C. for D. At