问题

__________ from the moon, the earth looks like a colorful ball[ ]

A: Seeing
B: Seen
C: Having seen
D: Having been seen

正确答案是：

同类题型

So far, all of the infected people are thought _______ the flu after direct contact with sick birds

You used to be quiet, ________ you

We don’t have ________ to buy this sweater, although the sweater is_______

What day is tomorrow ——Tuesday.

The manager devotes all his spare time ______ the violin.