．
live by
C
．
go by
D
．
go on
21.He was just too busy yesterday, (
), he certainly would have gone with you.
A
．
however
B
．
spontaneously
C
．
almost
D
．
otherwise
22.These European countries were afraid of being dragged into this dispute. It might (
) them in a war.
A
．
urge
B
．
involve
C
．
head
D
．
lead
23.(
) the beautiful weather there, he felt he had overcome his depression and tiredness.
A
．
Thanks to
B
．
But for
C
．
Instead of
D
．
Apart from
24.I found it hard to concentrate on my work (
) so many people around.
A
．
during
B
．
when
C
．
because
D
