—He should have come to join in the thorough cleaning. —He ________, I think. It's not his turn.
The doctor will see you again next week.________,you must rest as much as possible.
When you learn English,don’t try to learn too many words________.It’s best to review frequently.
He is wearing sunglasses to________his eyes from the strong sunlight.
It is________to go into the deep forest,for the snakes may make you________.
—Shall we eat out or stay in? —________.