. The government has taken some measures to solve the shortage of electricity, but it may be some time _________ the situation improves.
| A．since | B．when | C．unless | D．before |
Without facts,we can’t form a correct opinion,for we need to have actual knowledge____ our thinking.
| A．which to be based on | B．on which to base |
| C．which to base on | D．which to base |
With a good ______ of both Chinese and English,she had an advantage over the other interviewees.
| A．program | B．guidance | C．command | D．ability |
He stayed up too late every night,______ to catch up with his classmates.
| A．Having determined | B．being determined |
| C．determined | D．to determine |
Exercise is _______ as any other to lose unwanted weight.
| A．such useful a way | B．so useful a way |
| C．as a useful way | D．as useful a way |
______known to us,_______ increasing number of students are buried in their studies.
| A．What is;a | B．It is;the | C．As it is;the | D．As is;an |