问题

We’ll have a picnic in the park this Sunday ________ it rains or it’s very cold

A:since
B:if
C:unless
D:until

正确答案是：

同类题型

I know father’s mother is my _______

I can’t see the word on the blackboardYour headis___.[ ]

vernment has taken some measuresto overcome the lack of electricity, but it may take some time _____ we haveenough power

There ______a number of books in our school library. The number ofbooks________getting larger than last year.

Paper is made ___wood, and wood is made ___paper.