单项填空
21. Justin a book about his adventures in Tibet．I hope he can find a good publisher when it is finished．
A．was writing B．is currently writing
C．has already written D．wrote
22. —Hey! Lucy! Have you heard about the optional courses this year?
— What about that?
A．Not really B．Not exactly C．Not simply D．Not nearly
23. Yesterday Tim didn’t watch TV, did he read newspapers．
A．nor B．none C．either D．so
24. —What were you trying to prove to the police?
— I was last night．
A．Where B．When C．That D．What
