______ is _____ the students to find out the meaning and the usage of new words.
Several ________ students came to the meeting.
Mom, may I go swimming with my friends in the river? –No, you _________. That’s too dangerous.
Could I________ your CD player, please? –Sorry . _________is broken.
Look, Mr Green is on the other side of the street. — It _____ be him.He has gone to London on business.