— I’m sorry that I can’t go to your party tonight.— ________? Haven’t we agreed on it?
. Teaching a pronunciation class to a mixed group of learners can a teacher with many challenging problems.
If you do not feel well, you should not ____going to see the doctor. ?
The period ____dance classes increases gradually from two or three hours a day to five or six.
Some eighty years ago three-quarters of American production ____family farms or from business employing fewer than six people.
The college is planning to offer more English courses to ____the needs of beginners of English.