It’s necessary for human beings to breath _______ and plants can produce it.
#17259
A
CO2
B
H2
C
O2
D
N2
推荐题目
—You look very beautiful. — _________.
#17234
A
That’s right
B
No, I don’t look beautiful
C
That’s all right
D
Thanks
In English-speaking countries, ____is unlucky number while ____is unlucky number in China.
#17087
A
14;4
B
13;4
C
11;4
D
13;0
—Where have you been these days?—I have been to Bei Daihe with a friend .
#17283
A
in Chinese
B
of Japan
C
of American’s
D
from Canada