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下列字母书写格式正确的是 ____。
#16885
A
B
C
D
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Our planet is about         years old.
#17203
A
35,000
B
4600
C
4600 million
D
500 million
Which is not allowed if you have drunk too much wine ?
#17200
A
B
C
D
Pandas like eating _____ and elephants like eating ____.
#17216
A
leaves, grasses
B
leaves, grass
C
leaf, grass
D
leaf, grasses
It’s necessary for human beings to breath _______ and plants can produce it.
#17259
A
CO2
B
H2
C
O2
D
N2
Math is a little difficult, but I still like it very much.
#17281
A
few
B
kind
C
kind of
D
a few