I don’t doubt ______ he will pass thetomorrow’s exam.

The science of medicine, _______ progress has been very rapid lately, is perhaps the most important of all the sciences.

When did you ____staying up so late?— When I entered this school two years ago, where students have too much homework to do.

一Do you have a soccer ball一No, I , but my brother .

There are few new words in this article, __________ noone can understand it.