His ability has never been in doubt----the question is ___________ or not he is prepared to work hard.
#31580
A
that
B
if
C
where
D
whether
推荐题目
Unlike watching TV, reading is a highly active process _______ it requires attention as well as memory and imagination.
#80214
A
until
B
but
C
unless
D
for
Read this story，________you will realize that not everything can be bought with money. (2013·四川，4)
#30220
A
or
B
and
C
but
D
so
Find ways to praise your children often，________ you'll find they will open their hearts to you.(2011·山东)
#30481
A
till
B
or
C
and
D
but
Many workers were organized to clear away remained of the World Trade Center.
#30115
A
those
B
that
C
what
D
where