问题

Why was Prof.Yang unhappy these days?— Because the theory he insisted on ________ wrong.[ ]

A: proved
B: proving
C: being proved
D: was proved

正确答案是：

同类题型

I hear it won’t be ______ he graduates from the university

Do you know_____——He is a dentist.

_________， I have toput it away and focus my attention on study this week

It’s an ________well (井).Stay away from it.

__ in the warm sunlight, I soon fellasleep on the sunny beach