Are you going to stay overnight? —Not _____ it’s really necessary

Will you go shopping tonight –If you go , ________.

―I believe it is the only solution to this problem.―That’s debatable, I think. I can_______five other solutions as good as that.

According to the rules, students ______ get grades not lower than 85% in any subject in order to get the scholarship.

They are both very nice.I don’t know ___