Be _____ guard against pickpockets.
A: on
B: by
C: with
D: of
第1题
It is _______ to tell which is earth and which is sky.
A: enough easy
B: easily enough
C: easy enough
D: enough easily
第2题
Man: English is a difficult language to learn.
Woman: ______
A: I think the grammar is easy.
B: It's not very difficult to learn.
C: I've found it very easy.
D: True, but the grammar is quite easy.
第3题
You may look at a group of cows ____ under the trees.
A: stood
B: stands
C: standing
D: to stand
第4题
The real difference between plants and animals ____ what they do, and not in what they seem to be.
A: lies in
B: lies with
C: lies down
D: lies up
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