The （）of employees in this company has doubled.

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

A.failed
B.missed
C.lost

单项选择题Mary （） into the room.

A.burst
B.crashed
C.hit

单项选择题The war （） in 1937.

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

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

A.empty
B.open
C.wide

单项选择题Mary likes living （）.

A.lonely
B.alone
C.in person