I know one of the things I was unsure about was _____ hard it would be to climb this mountain.
#66039
A
what
B
that
C
however
D
how
推荐题目
---- ______ go to the theatre together with me?   ---- Good idea. 
#59438
A
Why not
B
Why do you
C
How about
D
What about
____ it is to skate on real ice!
#66033
A
What fun
B
What a fun
C
How a fun
D
What funs
Please do me a favor, —      the box upstairs. 
#66093
A
carry
B
to carry
C
carrying
D
having carried