______ is obvious to the students that they should get well prepared for their future.
—_______ I book a table for dinner in advance?—Yes,you _______.The restaurant is always full of people.
The police have said that this situation _________ as soon as possible.
—There is a lot of smoke coming out of the teaching-building there.—Really?It _________ be a fire,most probably.
—_________ he start at once or wait for a while?—Let him start at once.
—Is the man our sales-manager?—No,it _________ not be him.He never plays cards.