It’s two years since they ____ each other， and they are going to get married next month.

．Didyou have trouble_________the entrance to the hill

Our school has about 100 computers, but only sixty percent ____ used regularly.

Could you come back home at three o’clock—_________. I will have a meeting at half past two and it will last two hours.

This blue shirt doesn’t fit you．I think that black one_______good________you．