This is one of the most important thin...

单项选择题This is one of the most important things （） all.

A.among
B.in
C.of

1.单项选择题Tom is a person who always （） up to dangers.

A.meets
B.faces
C.sees

2.单项选择题He worked in this company （） several years.

A.in
B.since
C.for

3.单项选择题The （）of employees in this company has doubled.

A.sum
B.amount
C.number

4.单项选择题The Europeans （）to stay ahead in aeroplane design.

A.failed
B.missed
C.lost

5.单项选择题Mary （） into the room.

A.burst
B.crashed
C.hit

6.单项选择题The war （） in 1937.

A.broke up
B.broke off
C.broke out

7.单项选择题She was sleeping with （） windows.

A.empty
B.open
C.wide

8.单项选择题Mary likes living （）.

A.lonely
B.alone
C.in person

9.单项选择题（） aeroplanes in this company are Boeing planes.

A.Most of
B.Most
C.The most

10.单项选择题You must （）your bad habits.

A.give off
B.give up
C.give out