It is not until the disease has progressed to AIDS ____a person begins to look sick.
#85053
A
who
B
that
C
where
D
before
推荐题目
Is ________48 hours________ the man- made satellite ________ is made in our country to orbit the planet around?
#85134
A
it; that; where         
B
it; when; what
C
it for; that it takes; that
D
it; that it takes; which
It was ___ he came back from school today ___ he found his new book missing.
#85291
A
when; then
B
not; until
C
not until; that
D
only; when
It is _____ he often fails in exams _____ makes his parents worried about him.
#84753
A
what; that
B
that; what
C
that; that
D
/; that