Tom was about to close the window his attention was caught by a bird.
| A．when | B．if | C．and | D．till |
China's present environment situation is from bad to worse and if we _________ now to protect the environment, we’ll live to regret it.
| A．hadn’t acted | B．haven’t acted | C．don’t act | D．won’t act |
In recent years the consumption of aspirin _______ enormously in America.
A was increasing B. has increased C. had increased D. will be increasing
–Would you be kind enough to help me with my homework at one o’clock this afternoon?
-- . Will two o’clock be OK?
| A．Sure, it’s up to you | B．Sure, no problem |
| C．Sorry, I can’t make it | D．Sorry, I’m not available today |
--- One of the Fortune Global 500 companies offered her a position, but she refused.
---_________ ? It is a very good chance.
| A．Guess what | B．So what | C．Who cares | D．But why |
Yesterday I witnessed ____ car hit a tree and ___ driver was killed.
| A．A; a | B．The; the | C．A; the | D．The; a |