With prices _____ so much, it's hard for the company to plan a budget.
| A．fluctuating | B．waving | C．swinging | D．vibrating |
I have reached a point in my life __ I am supposed to make decisions of my own.
| A．which | B．where | C．how | D．why |
--I wonder if you could spare a little time to help with my English tonight?
--_____. I have no extra work to do anyhow.
| A．Sure, go head | B．No, well done | C．No, indeed | D．Certainly, after you |
_____is known to us all is that we should do as much as we can ______ stop the pollution of the environment.
| A．It; help | B．What; to help | C．As ; to help | D．That ; help |
If he_____his teacher' s advice, Asafa Powell would not be the fastest man in the world.
| A．didn't follow | B．wouldn't have followed |
| C．hadn' t followed | D．hasn' t followed |
So suddenly _____ that the animals in the zoo looked very frightened during the total solar eclipse ( 日全食).
| A．did the sky turn dark | B．the sky did turn dark |
| C．turned the sky dark | D．was the sky turned dark |