用所给词的适当形式填空,每词限用一次。
1.I am sorry you________ the last train.It left thirty minutes ago.(miss)
2.The young teacher thought it easy________ the project to the students.(explain)
3.The volunteers from our city________ some training before they go to Tibet.(take part in)
4.--As a well—known actor are you feeling happy?
--Not really.Sometimes I have a hard time________ who my real friends are.(know)
5.A famous inventor________ to our school last summer vacation.(invite)
6.Don’t bother your brother while he________ something with his classmates.(discuss)
7.Singing English songs well________ you can speak English well.(mean)
1.have missed
2.to explain
3.will take part in
4.knowing
5.was invited
6.is discussing
7.doesn’t mean