----- Nội dung dịch tự động từ ảnh -----
to visit friends and family several times
D. have returned
B. will have returned C. am returning
the celebration began
23. Since I left Venezuela six years ago, I
A. return
D. has been won
C. will be won
a small dint in the rear fender.
24. After the race
B. is won
A. had been won
25. While he was washing his car, Mr. Brown
B. was discovering
D. discovered
C. is discovering
A. has discovered
26. The earth
on the sun for its heat and light
A. is depended
C. is depending
B. depends
D. has depended
on the computer
27. I'm busy at the moment
A. I work
C. I'm working
D. I worked
B. I'm worked
over the Atlantic
B. we'll be flying
28. At this time tomorrow
A. we're flying
C. we'll fly
D. we're to fly
next us at the airport tonight
B. are going to
29. Our friends
A. are
C. go to
D. will be to
30. When I entered the room, everyone
A. has been dancing B. was dancing
C. had danced
D. danced