The scientists ________ on the new medicine for two years. They will succeed in no time.
| A．work | B．are working | C．have worked | D．will work |
As we know, England is ______ European country and Singapore is ______Asian country.
| A．an; an | B．an; a | C．a; a | D．a; an |
---Do you think there are______ new words in this unit ?
---Yes, that’s right. I’ll ______first.
| A．too much, look them up | B．too many, look up them |
| C．much too, look them up | D．too many, look them up |
---What _____useful book !
---Yes, it is. But I find it ______ difficult for me to read.
| A．an, very | B．a, too | C．an, too | D．a, quite |
--- Did you finish _____ the book?
---Yes, I did. Thanks ____ your dictionary, I had a better understanding of it.
| A．reading, for | B．reading, to | C．to read, for | D．to read, to |
---Go and ask the waiter how much_____.
---Don’t worry. It has been _____.
| A．does the meal cost, paid for | B．the meal costs, paid |
| C．the meal spends, paid | D．the meal costs, paid for |