----- Nội dung dịch tự động từ ảnh -----
30. That was a very old place for visit.
В
C D
31. I heard him to leave the house early this morning.
A
A
D
32. All students were allowed coming in the class.
A
C
D
33. This room is too small being in.
В С
A
D
34. Approximately70 percent of all parents let their children to attend school.
A
C
D
35: While I did my homework, I had a good idea.
A
B
C D