Most of the evidence was destroyed in the fire. ______, it would be almost impossible to prove Jim guilty.

 People say that young Chinese students’ eyesight keeps dropping _________ because of both too much homework and poor learning conditions.

An American girl survived the plane crash that killed the rest of the passengers _____.

He looked at those jewels one after another ______and seemed to show no interest in any one of them.

If we leave right away,____ we’ll arrive on time.