24. – Jack, when shall we go to visit Mr. Smith?
– It’s up to him. We’ll go to see him whenever _______.
| A．he is convenient | B．he will be convenient |
| C．it will be convenient for him | D．it is convenient for him |
Days of snowstorms have left the cityunder thick layers of ice and some 50,000 homes without power．
| A．to be trapped | B．trapped | C．having trapped | D．being trapped |
Heavy smog blankets Beijing．,city authorities start using its new smog warning system．
| A．In turn | B．In time | C．In response | D．In return |
Thanks todrama currently on air, Man From the Stars, South Korean TV dramas haveattractedwider audience．
| A．the; the | B．a；a | C．a; the | D．a; / |
—Sally, do you mind if I take off my jacket?
—Of course not．．
| A．It doesn't matter | B．Make yourself at home |
| C．Enjoy yourself | D．Forget it |
Not until he went through real hardship ________the love we have for our families is important.
| A．had he realized | B．did he realize | C．he realized | D．he had realized |