（2013·北京卷) Don’t turn off the computer before closing all programs you could have problems
| A．or | B．and | C．but | D．So |
______ was done by the girl students.
| A．One three of the work | B．One third of the works |
| C．Two third of the works | D．Two thirds of the work |
Which of the following is wrong?
This book is easy enough for ______.
| A．a six-year-old child | B．a child of six years old |
| C．a child aged six | D．a six years old chil |
Fifty-six ______ twenty-seven makes eighty-three.
| A．plus | B．minus | C．times | D．divided by |
Every means ______ tried, yet no result ______encouraging up to now.
| A．have been ...is | B．has been...has been | C．have ...has been | D．has...is |
Peter was ______ to come to school this morning.
| A．a second | B．the second | C．a No. two | D．the two |