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
With all the magazine he needed    ,he left the library.
#97495
A
borrowing
B
borrowed
C
borrow
D
to borrow
It’s important for the figures       regularly.
#95967
A
to be updated
B
to have been updated
C
to update
D
to have uodated
He felt his chair ___ at the time of the earthquake.
#98171
A
moved
B
to move
C
is moving
D
moving