Theuniversityestimatesthatlivi-优题课

The university estimates that living expenses for international students ________ around $8,450 a year,
which ________ a burden for some of them.

A．

are；is

B．

are；are

C．

is；are

D．

is；is

科目英语题型单选题难度中等

The patient has been ___ by nurses night and day since the operation.

You can have your computer repaired by John, which is ___ he is ___.

After a series of researches, they finally ___ that the pollution was the leading factor contributing to the death of the creatures in the river.

The evening party ___ cheers but everyone was still immersed in the happy atmosphere of it.

In the past few years the worked ___ a lot of suggestions but none of them was adopted.