Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.
#98604
A
to see
B
to be seen
C
seeing
D
seen
推荐题目
________ many times，I still didn't know how to operate the machine.
#91844
A
Having taught
B
Having been taught
C
Being taught
D
Teaching
Mike failed to finish his homework on time, so he tried to avoid _______ his teacher.
#96467
A
meet
B
to meet
C
to meeting
D
meeting
I’m tired out．I stayed up the whole night, ______ for my midterm math exam．
#95982
A
studying
B
to study
C
to be studying
D
studied