The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |
When the mountains came into ______sight at last, everyone took ______long and deep breath with______ pleasure.
| A．/; a; the | B．the; a; / | C．/; a; a | D．/ a; / |
The film was terrible. It wasn’t ______to the teenagers.
| A．benefits | B．benefited | C．of little benefit | D．of much benefit |
---Did you visit the famous museum?
---No. We ________ it, but we spent too much time shopping.
| A．could have visited | B．must have visited |
| C．can't have visited | D．shouldn't have visited |
We’ll pay a ______visit to the beautiful city if we have enough time.
| A．a four-days | B．a four-day | C．four days | D．a four day |
Our company forbids ______, that is to say, we are not allowed ______here.
| A．to smoke; to smoke | B．smoking; smoking |
| C．smoking; to smoke | D．to smoke; smoking |