Animals are part of nature. _____ should be well prepared.
#55466
A
and
B
or
C
but
D
while
推荐题目
The rivers will become dirtier and dirtier _______ we take action to protect them.
#55533
A
since
B
if
C
until
D
Unless
--Is my answer to the math problem fight? ---Let me consider it carefully I give you an answer.
#58299
A
before
B
after
C
since
D
as soon as
.—_____? —I usually play tennis.
#56077
A
Why do you play tennis
B
What do you usually do on weekends
C
When do you play tennis
D
Where do you play tennis