The fireman couldn’t __________ what the dark thing was through the heavy smoke.
Let us suppose that you are in____ position of____ parent. Would you allow your child to do such a thing?
Our TV sets sell well, but ten years ago no one could have imagined such a big share in the market that they ____.
In salad bars the waiter does not bring you salad. You have to____ yourself, usually to as much as you want.
---How do you like the film?---There was nothing special--- it was only ____.
--- What are you going to do next?--- To write a science story about outer space ___ by Science and Technology Press.