Nowadays scientists are working hard to find out ______ to do with air pollution.
#37100
A
how
B
why
C
when
D
what
推荐题目
-Why does Mrs. Smith like koalas? - _______ she thinks they are very cute.
#40112
A
So
B
But
C
Because
D
And
I don’t know when he_____________; when he__________, I’ll tell you.
#39636
A
come; will come
B
will come; comes
C
comes; will come
D
will come; comes
The koala is _________animal. It’s _________cute.
#36398
A
kind of; kinds of
B
a kind of; kind of
C
a kind; a kind
D
kinds of; kind of
Yuejiang Tower is a good place to enjoy the beauty of the Changjiang River because of its .
#39638
A
size
B
length
C
height
D
shape