问题

_____ many times, he finally understood it. [ ]

A: Told
B: Telling
C: Having taken
D: Having been told

正确答案是：

同类题型

The light is still on. He _____ to turn it off when he _____ the room.

There is a great deal of evidence _____that music activities engage different parts of the brain. [ ]

You are late again! We _________you could attend the assembly on time.—Sorry, I __________to my office to get my papers

There was something wrong with the network, or the email ________ earlier.

he rightopportunity , she’ll take it