Choose the best answer to complete the sentence.
I can't help………………a little more.
A.waiting
B.have waited
C.to waiting
D.to wait

Choose the best answer to complete the sentence.
Don’t forget………………the door when you go out.
A.locking
B.lock
C.to lock
D.for locking

Choose the best answer to complete the sentence.
The policeman warned us………………there.
A.not going
B.not to go
C.not to going
D.to not go

Choose the best answer to complete the sentence.
I hate………………a child……………….
A.see/ cry
B.seeing/ to cry
C.see/ crying
D.seeing/ cry

Choose the best answer to complete the sentence.
I would like………………Holland.
A.visiting
B.to visit
C.visited
D.visit

Choose the best answer to complete the sentence.
Don't forget………………the door before………………to bed.
A.locking/to go
B.locking/going
C.to lock/going
D.to lock/to go

Choose the best answer to complete the sentence.
My family has decided………………Da Lat in the summer.
A.visited
B.visits
C.visit
D.to visit

Choose the best answer to complete the sentence.
Professional people expect………………when it is necessary to cancel an appointment.
A.you calling them
B.that you are calling them
C.that you would call them
D.you to call them

Choose the best answer to complete the sentence.
When my father was young, he………………get up early to do the gardening.
A.got used to
B.use to
C.was used to
D.used to

Trong các mức cấu trúc siêu hiển vi của nhiễm sắc thể điển hình ở sinh vật nhân thực, mức cấu trúc nào sau đây có đường kính 30 nm?
A.Vùng xếp cuộn (siêu xoắn).
B.Crômatit.
C.Sợi nhiễm sắc.
D.Sợi cơ bản.