---How many arms _____ there? ----There _____ an arm.
A. are, are B. is, is C. are, is
We should encourage our students ________ hard instead of ________ too much time playing games.
| A．work; spend | B．to work; spend |
| C．work; spending | D．to work; spending |
—What were you and your cousin doing at this time yesterday?
—He was reading a magazine ________ I was writing an e-mail.
| A．as | B．while | C．when | D．after |
Mr. Green told us _____ turn the lights off when we leave the classroom.
| A．not forget to | B．not to forget |
| C．not to forget to | D．to forget not to |
This story is ______ easier and ______ interesting to read than that one.
| A．much; more | B．more; more |
| C．more; much | D．much; much |
____ bad news it is and how _____ the students all look when hearing it!
| A．What; surprised | B．what; surprising |
| C．What a; surprised | D．How; surprising |