The central heating system of this office building is down and several workers ______ it right now.
A. had repaired B. have repaired C. repaired D. are repairing
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
