The reason ______ he gave for not coming was ______ his mother wouldn’t allow him to.
| A．why ; that | B．for which ; that | C．why ; because | D．which; that |
The zoo keepers is worried because the number of visitors __smaller
and smaller.
| A．become | B．became | C．is becoming | D．have become |
With films like Avatar proving__________ in cinemas, many technology experts believe 3D is now set to take over the home market,
| A．difficult | B．easy | C．common | D．popular |
Look out! Keep away from the house, _____ the roof is under repair．
| A．whose | B．which | C．of which | D．where |
YaoMing, as we know,_____ like to play basketball.
| A．does | B．appears | C．feels | D．sounds |
There are over 58,000 rocky objects in ______ space, about 900 of which could fall down onto ______ earth.
| A．the; the | B．/; the | C．the; a | D．a; / |