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
---Who is to give us the lecture today? ---The lady _____ our headmaster into the hall.
#95480
A
follows
B
following
C
followed
D
to be followed
It was a sunny afternoon and so I suggested ______ to the beach .
#89681
A
going
B
to go
C
go
D
having gone
Great attention must be paid ____ welfare, especially in the poor area.
#89594
A
develop
B
to develop
C
to developing
D
developing
Most of the people _____ to the party were famous scientists.
#98275
A
invited
B
to invited
C
being invited
D
inviting