However, at times this balance in nature is ________ resulting in a number of possibly unforeseen effects.
A. troubled B. bothered C mixed D. disturbed
----Who are those people gathering in front of the building?
-----A group __________ itself the youth volunteers.
A. calling B. calls C. called D. to be called
----- The opening ceremony has already started.
------Look! The flag is _______ now.
A. risen B. raising C. being raised D .being rose
----Young people shouldn’t always change their jobs.
-----_____________. Young people should seek for more challenges.
A． It’s all the same to me. B. You have a point there.
C． That’s not the way I see it. D.I believe so.
______that silver is not widely used as a conductor(导体)?
A. Why is B. Is it why C. Why is it D. Why it is
He was a much older player but he had the great _______ of experience.
A. advantage B. respect C. success D. interest
