I’m not sure whether he has the key that ______ the door of the classroom.

Jim，you said you’d lend me your MP5.—I’m sorry I forgot my promise but you ________ have it next Saturday.

e a promise ________he earned money, he would build a new school to help develop education.

In the meeting, the professor expressed his thanks for the aid he _________ from his students

the crisis of economygetting more and more serious, the government is searching for ways to improvepeople’s lifeA