单选题 The number of tourists to the resort _____ by 10%.

单选题 I did not go the cinema last night. _____ I had to finish my homework.

单选题 --What is your brother doing now?
-- He____ in his room.

单选题 We can not find our car. Could you help_____ find it?

单选题 It is _____ useful gadget. I bought it last week.

单选题 -- _____students are there in your class? -- Forty-nine.

单选题 -- Must I return the dictionary today?
-- No, you ____. you can return it tomorrow.

单选题 Sam walked in, with the rest of the boys _____ closely behind.