Bài 2: chia động từ ở thì hiện tại hoàn thành

2. There _______________ a lot of changes in Vietnam since the 1990s.

A. was

B. have been

C. has been

D. are

3. It _______________ him almost 1 hour to go to school by bus every day.

A. takes

B. took

C. has taking

D. is taking

4. Her hometown _______________ a lot of hills and mountains.

A. has

B. gets

C. is

D. has got

5. My dog _______________ my cat since I came home.

A. is chasing

B. has chased

C. chased

D. chases

6. I fell asleep while I _______________ my homework last night.

A. was doing

B. have done

C. did

D. is doing