-- Tom works hard at English.?-- _____, and _____.
30.The extra room________very useful when we had visitors.
29.Don’t touch anything.Better leave things_________they are until the police arrive.
28.You can ask him again if you like,but it won’t make any __________he will still say no.
27.—I can’t find Fred.He is not at home. —Why don’t try______him?
26.I like the feeling of being up high in the sky.I can’t think of anything_______in the world.