E-mail, as well as phone calls, _____________ an important part in daily communication.
| A．are playing | B．is playing | C．have played | D．has played |
An indoor man refers to a person who spends __________ time on indoor activities, such as playing computer games, sleeping and watching sports on television.
| A．appropriate | B．specific | C．limited | D．considerable |
---- __________ you say goodbye so soon?
---- I’m sorry. My mother is expecting me at home.
| A．Must | B．Can | C．Would | D．Might |
It is known to us that it was such great efforts _____________ all the Chinese athletes had made _________ helped them get 51 gold medals in the 2008 Beijing Olympic Games.
| A．as, that | B．that, which | C．that, as | D．which, which |
When they retire, many people over 60 prefer the houses in the country to spend their remaining years to __________ in a large city.
| A．it | B．that | C．those | D．which |
We have a high regard for Mr. Smith because he always tries to _____________his principles.
| A．look forward to | B．live up to | C．keep up with | D．put up with |