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【单选题】
– There’s somebody at the door. Who ____ it be? Is it the postman? -- No. It ______ be him. It’s just seven o’clock. It’s too early.A.
must, may not
B.
will, won’t
C.
may, mustn’t
D.
may, can’t
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【简答题】We plant trees in spring every year.
【单选题】To avoid the mistakes of our forefathers, the author suggests that______.
A.
we plant more trees
B.
we return to nature
C.
natural sciences be taught to everybody
D.
environmental education be directed toward everyone
【单选题】To avoid the mistakes of our forefathers, the author suggests that ______.
A.
we plant more trees
B.
we return to nature
C.
natural sciences be taught to everybody
D.
environmental education be directed to everyone
【单选题】We must plant more trees, The more trees we plant ,___pollution we’ll have.
A.
the more
B.
the less
C.
the most
D.
the least
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