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【单选题】
________you need to be able to concentrate.

At work
Work
Working
Worked
【单选题】
The __________ feelings are good for health.

negative
positive
special
specific
【单选题】
She never married and she never went to school____________ .

either
also
too
neither
【单选题】
What role does a teacher play in the following activity? When students are doing a group-work task, the teacher joins one or two groups for a short period of time.

Controller
Assessor
participant
Resource-provider.
【单选题】
Most importantly, such an experience helps ____ a heightened sensitivity to other cultures and will bring about a greater appreciation of ones own culture as well.

coach
forsake
foster
censor
【单选题】
Nothing is ( ) than good health.

best
better
worse
bad
【单选题】
( ) smoking do harm to our health?

Why
What
When
Does
【单选题】
A precis should be concise; that is, it should be [] than the original material.

complicated
clearer
simpler
【单选题】
Poor health can be[填空] to unemployment.

own
due
/
lead
【单选题】
I haven’t read ____ of his books, but judging from the one I have read I think he’s a very promising writer.

any
none
both
either