There are still many problems ______ before we are ready for a long stay on the Moon.
#88396
A
solving
B
solved
C
being solved
D
to be solved
推荐题目
He apologised to me for his ________ my letter．
#96664
A
delaying answering
B
delay to answer
C
delaying to answering
D
delaying to answer
In order to make our city green, _______.
#98611
A
it is necessary to have planted more trees
B
many more trees need to plant
C
our city needs more trees
D
we must plant more trees
She was afraid __________ the dog in case it became dangerous.
#98681
A
of exciting
B
to excite
C
that she excited
D
to be exciting
—What happened to you on your way back to the hotel last night ?—I lost my way in complete darkness and, ________ things worse , it began to pour .
#98170
A
making
B
to make
C
having made
D
made