1.用过去分词改写句子
At last I succeeded in making him understand me.
_______________________________________________
2.Generally speaking, _______according to the directions,the drug has no side effect.
A.when taking B.when taken C.when to take
3.Unless______to speak ,you should remind silent at the conference.
A.invite B.inviting C.being invited D.having invited
4._______you lose your job;what would you do then?
A.Tell B.Look C.Say D.watch