how to work out the difficult physics problem ,he asked the teacher for help .
A. Not to know B. Not knowing C. Knowing not D. Not known
“Mum !” she cried suddenly , tears down her cheeks .
A. rolling B. rolled C. to roll D. being rolled
prices , we have to take into consideration the quality of the goods .
A. While compared B. Compared C. Compare D. When comparing
you meet with new words when reading English articles , you can guess the meaning first .
A. Every time B. First time C. For the first time D. At the time
As it turned out to be a problem of no importance , we so much time looking into it .
A. needn’t spend B. didn’t have to spend
C. needn’t have spent D. oughtn’t to spend
The specialist at the meeting will give us a lecture next week .
A. referred B. referred to C. referring D. referring to
