Such _________ the difficulties that we are now faced with.
#86187
A
are
B
is
C
is being
D
be
推荐题目
Tom’s teacher and friend ____ Mr. Smith.
#86137
A
are
B
is
C
arebeing
D
has
You are not supposed to get off the bus ________ it stops.
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A
though
B
while
C
until
D
because
Four-fifths of the crop ______. 
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A
are ruined
B
was ruined
C
were ruined
D
have been ruined