1 . If not ______ in time, a problem will cause more problems in your life.

A．deal with

B．being dealt with

C．dealt with

D．to deal with

2 . 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

3 . 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

4 . Music and art, when ________ (use) in hospitals, help to improve the conditions of patients by reducing stress, anxiety and blood pressure. （所给词的适当形式填空）

5 . While ________ the daily routines in the staff office, we could hear at least three languages ________ at the tables around us.

A．discussing; being spoken	B．we were discussing; speaking
C．discussed; being spoken	D．discussing; speaking