Don’t promise anything ______ you are one hundred percent sure.
#74420
A
whether
B
after
C
how
D
unless
推荐题目
_______ in the school rules that boy students should not wear long hair.
#72293
A
What is required
B
What requires
C
It is required
D
It requires
It is uncertain____side effect the medicine will bring about，although about two thousand patients have taken it.
#67381
A
that
B
what
C
how
D
whether
He expressed a hope _______ he would visit China again the next year, and this was the very hope _______ he would express as soon as he arrived in the country.
#72635
A
that; that
B
which; which
C
that; which
D
which; that
After designing more experiments,they were able to clarify the procedure bees communicate information that they use to find and fetch food.
#71656
A
by which
B
in which
C
by that
D
for which