Great efforts to increase agricultural production must be made if food shortage ______ avoided.
| A．will be | B．can be | C．has been | D．is to be |
Generally speaking, clothing made of man-made fibers is less superior than _______ made of natural fibers like cotton, wool or silk.
| A．that | B．this | C．what | D．one |
. _______ the meeting room,he found all the parents already _______ there.
| A．To enter; sitting | B．Stepping into;to seat |
| C．Entered; seat | D．Entering;seated |
.A man may usually be known by the books he reads _______ by the friends he keeps.
| A．as well as | B．as if | C．as soon as | D．as usual |
I _______ to help you but I was not able to spare any time.I _______ a paper last night and I'll have to finish it today.
| A．wanted; have been writing | B．have wanted;wrote |
| C．had wanted; wrote | D．had wanted;was writing |
There are so many books! It is not easy for us to decide what to take and what to_______.
| A．take on | B．pick up | C．leave behind | D．work out |