Can you imagine the great difficulty he had ________ his driving test last week

Could you tell me what time the train leaves Hefeifor Beijing—I’m afraid you need to ______on the Internet.

___the problem of land erosion getting more serious, the government is searchingfor a way to deal with it

we have done a lot to build a low-carboneconomy, but it is _______ ideal We have to work still harder

______________ do they donate money for