The number of people invited ___ fifty, but a number of them ___ absent for different reasons.
China's present environment situation is from bad to worse and if we _________ now to protect the environment, we’ll live to regret it.
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?
--- One of the Fortune Global 500 companies offered her a position, but she refused.---_________ ? It is a very good chance.
Yesterday I witnessed ____ car hit a tree and ___ driver was killed.