1.Nebraska has floods in some years, ___.
A.in other drought
B.droughts are others
C.while other droughts
D.others in drought
2.___ all behavior is learned behavior is a basic assumption of social scientists.
A.Nearly
B.That nearly
C.It is nearly
D.When nearly
3.Sir Dennis, who is 78, has made it known that much of his collection ___ to the nation.
A.has left
B.is to leave
C.leaves
D.is to be left
4.I hope that by posting the letter now at midday, I shall ensure ___ it before the weekend.
A.you receive
B.your receiving
C.you to receive
D.your having received
5.She has taken great pains to conceal her emotions, and thereby made them ___ conspicuous.
A.all the more
B.all the much
C.all more
D.all much