问题

It has been proved _________eating vegetables in childhood helps to protect you against serious illnesses in later life.[ ]

A: if
B: because
C: when
D: that

正确答案是：

同类题型

_______ the ball —It’s under the tree.

The boy you lent the pen to _____ it.

The car accident happened _____ his car wasout of order ___ I can’t drive.

I often feel worried about exams. I don’t know ________________it.—Maybe you can ask your teacher for help.

Zhongdian is 659 kilometers away from Kunming, and there are ______ flights between the two cities.[ ]