Members of the Beijing Wheelchair Dance Training Base, was set up in 2009, are able to manage their wheelchairs perfectly.
A．who B．that C．what D．which
On foggy days, you have to drive very ________ on the expressway to avoid traffic accidents.
A．cautiously B．neatly C．smoothly D．properly
One thousand dollars a month is not a fortune but would help cover my living .
A．bills B．expenses C．prices D．charges
—Mary broke up with me!
—You_ _have forgotten about the Valentine's Day．
A．shouldn't B．couldn't C．needn't D．mustn't
Have you considered how weak humans are a volcano, hurricane or earthquake?
A．comparing with B．to compare with
C．compared with D．having been compared with
Can you explain ________ the sun goes down in the west?
A．why is it that B．why it is that C．how it is that D．how is it that
