[单项选择]Children don' t ______ understand what are reciting, but gradually it will have in impact on thinking.
A. necessarily
B. profitably
C. unnecessarily
D. unprofitably

[单项选择]Children don't （） understand what are reciting, but gradually it will have an impact on thinking.
A. necessarily
B. profitably
C. unnecessarily
D. unprofitably

[单项选择]Children don''t ______understand what they are reciting, but gradually it will have an impact on their thinking.
A. necessarily
B. profitably
C. unnecessarily
D. unprofitably

[单项选择]Children don't ______ understand what are reciting, but gradually it will have in impact on thinking.
A. necessarily
B. profitably
C. unnecessarily
D. unprofitably

[单项选择]

What we don’t know or refuse to recognize is that modern man has been altering his total environment so swiftly and suddenly that the whole "great chain of life" on this planet is in danger.
All of us live on a tiny spaceship carrying with it its own limited resources for survival.What we have now is all we will ever have to keep us alive.
But man has been harming this system. He cannot help it. Everything we do alters our environment: the ways we grow food and build shelter and create what we call "culture" and "civilization".
World population is growing at such a rate that by the year 2050 nearly seven billion people will live on the earth.Industrialization has added its own burden to the population pressure. The more we produce and consume, the more waste products we discharge into the air and water and land around us, where they do not disappear, but last forever in one form or another. Great progress i
A. great progress
B. agriculture
C. our soil
D. productivity

[单项选择]（） what he says, don't trust him.
A. Even if
B. Though
C. Unless
D. No matter

[单项选择]I don't know what makes Christina so attractive to young men.


A. charming
B. special
C. different
D. beautiful

[单项选择]I don't quite follow what she is saying.
A. observe
B. understand
C. explain
D. describe

[单项选择]Don't keep us in . Tell us what happened!
A. suspension
B. suspense
C. tension
D. tense

[单项选择]If you know what the trouble is, why don't you help them to ______ the situation
A. simplify
B. modify
C. verify
D. rectify

[单项选择]"What was in the letter" "I don't know. I didn't like ______ it as it wasn't addressed to me.
A. to open
B. opening
C. open
D. opened