问题

_ the smoke come out of thebuilding, my first thought was to call the fire department as soon as possible.

A:Having seen
B:When seeing
C:When I saw
D:Seeing

正确答案是：

同类题型

Don’t forget _______ the lights when you leave the classroom.

ry morning, the fish mongers stoodthere ______ with the fishermen for fishes

omes of skilled workers went up , unskilledworkers saw their earnings fall

I’m going to Larry’s party. But I don’t knowwhat to wear.—If I ___ you, I _______ wear a dress.

eported that over 70 different emotions are usedin text messages,“happy” is the mostpopular.