Cars play an important role in modern life, but they_______also cause many problems like air pollution．
| A．should | B．can | C．must | D．will |
His sacrifices for the country were never officially _____, which made all of us feel discouraged．
| A．acknowledged | B．appealed | C．recommended | D．commanded |
He was very busy, and _____ he didn’t go to the party that night．
| A．however | B．otherwise | C．therefore | D．anyhow |
Police are searching for an escaped criminal who is reported to _____ since he broke away from the prison．
| A．have been missing | B．have lost |
| C．be missing | D．get lost |
---Sorry, I am late．
---That’s okay．You are here and that’s what
| A．does | B．works | C．stays | D．counts |
I am sure that you’ll love our best-seller, _____ you can read some good novels in simple English．
A which B．who C．that D．where