— So you missed the English class this morning?— ________. I arrived 20 minutes after it started.
It is said that his carelessness ____ the terrible accident.
Tom as well as his friends ____ to visit our school soon after they arrive in Changsha.
By the time you ____ in, I ____ two letters.
To ____ your dream of becoming a scientist, you must work hard from now on.
I ____ go to bed ____ the telephone rang.