| having had
18
．
The car ______ halfway for no reason.
A
．
broke off
B
．
broke down
C
．
broke up
D
．
broke out
19
．
“Need we work late today?” “No, but we ______ tomorrow.”
A
．
need
B
．
must
C
．
can
D
．
ought to
20
．
______ might be expected, the response to the question was very mixed.
A
．
As
B
．
That
C
．
It
D
．
What
21
．
Mr. Morgan can be very sad ______, though in public he is extremely cheerful.
A
．
by himself
B
．
in person
C
．
in private
D
．
as individual
22
．
By the time he arrives in Beijing, we ______ here for two days.
A
．
have been staying
B
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