The number of foreign students attending Chinese universities ________ rising steadily since1990.
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A
is
B
are
C
has been
D
have been
推荐题目
Three-fourths of the buildings ______.
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A
was destroyed
B
is destroyed
C
were destroyed
D
has been destroyed
Many a student ________ failed in the biology exam，and Tom is the only one of them who ________ decided to give up the course.
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A
have；has
B
have；have
C
has；have
D
has；has
The teacher， together with the students, _ __ discussing Reading Skills that ______ newly published in America.
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A
are; were
B
is; were
C
are; was
D
is; was