They use computers to keep the traffic _________ smoothly.
| A．being run | B．run | C．to run | D．running |
One reason for her preference for city life is she can have easy access to places like shops and restaurants.
| A．that | B．how | C．what | D．why |
the city center, we saw a stone statue of about 10 meters in height.
| A．Approaching | B．Approached | C．To approach | D．To be approached |
you may have, you should gather your courage to face the challenge.
| A．However a serious problem | B．What a serious problem |
| C．However serious a problem | D．What serious a problem |
Lucy has a great sense of humor and always keeps her colleagueswith her stories.
| A．amused | B．amusing | C．to amuse | D．to be amused |
I had great difficultythe suitable food on the menu in that restaurant.
| A．find | B．found | C．to find | D．finding |