I didn’t pass the Maths exam last time. I’m so worried about it.— harder, you will make much progress .

How long do you think it will be______man can finally solve the problem of cancer?—Well，it depends

The young scientist has made such greatachievements in his chosen field ______ nobody else can make.

We are not sure whichrestaurant_______tonight.

Don’t ________ your exams. They are very easy.