我很是纠结,求讲解.
1.He lived a happy life before ______ to New York.A .moved B.moving C.he moving
2.I couldn't_______read the email from my key pal.A.wait for B.wait and C.wait to
3.________,Ton listened to pop music.A.Finished his homework B.Having finished his homework C.Finishing his homework
= =谁能说出为什么选这个答案啊？有什么语法上的依据？我自己的答案是ACB= =、、、、