I still doubt _____ he can overcome(克服) all the difficulties..
#34437
A
why
B
whether
C
when
D
how
推荐题目
We made it possible the task would be finished ahead of time within three weeks.
#29955
A
what
B
that
C
which
D
how
________ good use you have made of your time to work, there is still some room for improvement.
#33762
A
Whatever
B
However
C
Though
D
Whether
________ 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
