I coutdn't have got to the meeting on time____________ an earlier train.
We must take measures to protect endangered wildlife _______ it is too late.
Listen!, his family must be quarreling, _______?
We read them ________; we remember them________.
Doctor Brown says that _______ what forceful arguments against cigarette harm there are, many people insist on smoking.
The government has taken some measures to solve the shortage of electricity, but it may be some time _______ the situation improves.