问题

The researchon the new flu virus vaccine is challenging and demanding Who do you think cando the job —______ mystudents have a try

A:for, at
B:to, at
C:to, by
D:for, by

正确答案是：

同类题型

This is the most serious and worst situation ___ I have ever experienced as a fan of the NBA.

In the room ______ window is wide open ______.

Rather than _____on a crowded bus, he always prefers _____a bicycle.

don’t think the two parties can agreement in the near future.

Our city has experienced _______ this year as it did last year