--- He looks so tired. What’s wrong? --- Nothing serious. He just stayed up last night, ___________his papers.
#93496
A
to prepare
B
having prepared
C
prepared
D
preparing
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The students expected ____ more reviewing classes before the exam. 
#95664
A
there to be
B
there are
C
there being
D
there to have
To succeed in a difficult task ,______________.
#97643
A
Persistence is needed
B
Persistence is what you need
C
One needs to be persistent
D
A persistent nature is needed
 _____ a reply, he decided to write again.
#91920
A
Not receiving
B
Receiving not
C
Not having received
D
Having not received