问题

He says all _ tried their best and that all that can be done _ been done.

A:has, has
B:have, have
C:have, has
D:has, have

正确答案是：

同类题型

According to the new class rule, students found cellphones in the classrooms will be asked to leave the rooms immediately.

need to apply all our tothis job, for it is very important to us all.

Traveling is a good way to differentcultures and broaden the mind

With time _______ by, he began making films.

The pricesystem is a complex network composed of the prices of all the products boughtand sold in the economy as well asof a great number of services.