问题
______ some problems have arisen in the process, we are confident that we can handle them.
A:As
B:If
C:While
D:Since
B:If
C:While
D:Since
正确答案是：
同类题型
Some of students go _______ a parent’s car to school every day. [ ]
_____ ! The bus is coming. — Oh, no. It’s too dangerous to cross the street now.
I’ll speak to Peter about his lessons when he ______ back from school. [ ]
I first met him_____a hot summer evening.[ ]
Have you ever seen _____ one-eyed elephant ?— No, never. And you?