Lots of rescue workers were working around the clock,__________ supplies to Yushu, Qinghai Province after the earthquake.
| A.sending | 
| B.to send | 
| C.having sent | 
| D.to have sent | 
 . I could hardly tell the twins apart because their appearances are only ____ different.
| A.slightly | B.gradually | C.personally | D.extremely | 
He is the lawyer who you took photos ____ you were in the Forbidden City.
| A.when | B.of when | C.where | D.of where | 
 This picture was taken when my father was a child and even I myself couldn’t _____.
| A.find him out | B.pick him out | C.put him out | D.take him out | 
 While ____ in tea with that dealer, Mr. Smith had himself ____.
| A.trading; ripped off | B.buying; ripping off | 
| C.selling; ripped off | D.purchasing; rip off | 
 Mary _____ be in London because I saw her in town just now.
| A.mustn’t | B.isn’t able to | C.needn’t | D.can’t |