1 . What I would like ______ now is ______ my bad habits and make up for my lost time.

A．doing; to break	B．to do; breaking
C．doing; breaking	D．to do; break

2 . These bad habits, if ______, will lead to serious problems.

A．leaving to be unchecking	B．left unchecked
C．left to be unchecked	D．to leave unchecking

3 . After seeing the play,       .

A．it made him read the book at once	B．he wanted to read the book at once
C．the book was immediately read	D．it interested him a great deal

4 . Many left-behind children, when ______ formal education, will probably show their talent in many aspects.

A．receive

B．received

C．to receive

D．receiving

5 . Sugar, when           with water, dissolve quickly.

A．is mixed

B．mixing

C．mixed

D．mix

6 . _______about her ideal university, Jenny said she had no idea.

A．Ask

B．When asking

C．Asking

D．When asked

7 . The car, if ________   by force, will send out sirens to attract people’s attention.

A．opened

B．open

C．opening

D．to open

8 . If __________ into a warm room, a piece of ice will turn into water soon.

A．take

B．took

C．taken

D．to be taken

9 . In the afternoon, ______, I found the trees and the houses were all covered with snow and the whole world became a white one.

A．while walked along the road	B．while walking along the road
C．while I walking along the road	D．while was walking along the road

10 . Children have been accustomed to ________ masks when ________ to the public in recent years.

A．wear; exposed	B．wearing; being exposed
C．wear; being exposed	D．wearing; exposed