________ astronauts cannot go to a baseball game or a movie in orbit , there are many familiar activities that they can still enjoy.
#31046
A
While
B
Since
C
Before
D
Unless
推荐题目
It will be quite a long time______she is back again, so don’t be too cross with her.
#80230
A
that
B
since
C
before
D
until
_______ travelling expenses rising a lot, we had to change all our plans for the tour．
#33058
A
As
B
By
C
Since
D
With
After ______ seemed an endless wait, it was her turn to enter the general manager’s office.
#32362
A
that
B
how
C
what
D
why
In the earthquake, parents were willing to do they could their children.
#33518
A
whatever; save
B
whatever; to save
C
what; saving
D
what; to save