---Don't skate on the lake! ---Why not? Isn't it thick enough___________?
—Which of the two magazines will you take? —I’ll take ____. One is for my sister and the other is for my brother.
Class Two, Grade Eight did ____ in the sports meeting last month. No class got ____ points than them.
It is said only three ____ of the students in our school ____ TV every day.
— ______ does Bob play tennis? — Twice a week.
— Who helped you clean the classroom yesterday? — Nobody. I did it all by ____.