问题

It began to rain ______ I was walking in the park.
A:until
B:because
C:while
D:although;
B:because
C:while
D:although;
正确答案是:
同类题型
ok is________ boring; it is, in fact,rather exciting and fascinating.
Would you please _____ the children ______ with snakes
__________, and you’ll get your research findings recognized in the medical circle.
-Can you see -No. Let’s go and have a look. Maybe wecan help them.
.____that I’m feeling all right,my brain is also beginning to work much better.