— I think English is __________ unimportant subject.
— I don’t think so. It is __________ useful tool when we talk with foreigners.
| A．a; an | B．an; a | C．a; a | D．an; an |
Look at the “No parking” sign. You _____park your car here.
| A．should | B．must | C．needn’t | D．mustn’t |
He was wearing a pair of sunglasses and I didn’t _____him at first.
| A．advise | B．promise | C．recognise | D．hear |
The book won’t____ until the end of the year.
| A．come out | B．come over | C．come true | D．come on |
Look at our new school. It ____ last year.
| A．built | B．was built | C．is built | D．will be built |
Robots _____more heavy work for us in the future.
| A．will do | B．did | C．have done | D．were doing |