I just don't understand_______ that prevents so many Americans from being as happy as one might expect.
| A．why it does | B．what it does | C．what it is | D．why it is |
—Was it there _______ you were away to answer the phone?
—There is no doubt about it.
| A．that | B．which | C．while | D．Where |
第一部分语言知识运用
第一节单项填空（共15小题，每小题1分，满分15分）
What lessons China can draw from ___ global financial crisis has become ____ hot topic among us students.
| A．the; a | B．不填; a | C．a; the | D．不填; the |
His business failure left him at the edge of desperation, but, , he managed to go out of the shadow through years of efforts.
| A．time and tide wait for no man | B．don’t count your chickens before they are hatched |
| C．no pains, no gains | D．time heals all wounds |
Canada is a country many different nationalities as well as one with foreign immigrants the majority of its population.
| A．making up of; occupied with | B．consisting of; making up |
| C．made up of; consists of | D．consisted of; taking up |
--- Has your father returned from Africa yet?
--- Yes, but he here for only three days before his company sent him to Australia.
| A．was | B．has been | C．will be | D．would be |