大明想知道 Sam来自哪里时.应该怎么说____A.what are you doing .Sam? B.where are you from.Sam?C.what are you going to do.Sam?
Remember not to speak________when we are in the reading room.
—________ we ask you some questions? —Sure, go ahead!
—________ I finish the work today? — No, you ________.
This book ________ Lucy’s. Look! Her name is on the cover. A. can’t be B. may be . mustn’t be D. must be
John ________ come to see us tonight, but he isn’t very sure yet.