is
are
has been
have been
第1题:
A、are…being
B、is…being
C、has…been
D、have…been
第2题:
A、has been
B、would have been
C、had been
D、was
第3题:
A、has compelled
B、have compelled
C、has been compelled
D、are compelling
第4题:
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第10题:
He is over fifty, but he looks as if he()only in his thirties.
第11题:
我们的重吊杆已经长时间不用了。()
第12题:
is
are
has been
have been
第13题:
To most of the students, Economics ( )always an important subject, also a difficult one.
A、is
B、are
C、have been
D、was
第14题:
A. if he is
B. if he had been
C. if he has been
D. if he should be
第15题:
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第21题:
At that time, she()on a journey with her friend
第22题:
The population of the earth()increasing fast.
第23题:
The president and the secretary ()attending the meeting.
第24题:
many people have labored to be leaders
leaders are beyond our understanding
the essence of leadership has not been grasped
the definitions of leadership should vary