I didn’t know ________ the professor would give us a lecture in the hall.
After all the students took their seats,the headmaster________.
You’d better make a good plan________you take a holiday.
This bus doesn’t go to the train station.I’m afraid you’ll have to________at the library and take the A52.
—Hurry up.It’s almost time for school.—Don’t worry.We are sure to be at school________.
Just before the English class,I suddenly realized that I________my English textbook at home.