People’s working efficiency usually decreases more or less when the temperature _________ 35℃ or even higher.
| A．approaches | B．raises | C．draws | D．drops |
Tom with his friends ______ volleyball since three o’clock.
| A．has been playing | B．is playing | C．have been playing | D．have played |
Peter was ______ to come to school this morning.
| A．a second | B．the second | C．a No. two | D．the two |
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 |
Fifty-six ______ twenty-seven makes eighty-three.
| A．plus | B．minus | C．times | D．divided by |
. 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 child |