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