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