I feel so tired, because there is________ homework to do and it’s ________hot today.

There is a bridge _____ the river in front of my house. Let’s go _____ it. [ ]

I often listen to the news _______ the radio. [ ]

do you go skateboarding?—Twice a week. [ ]

Fifty dollars for such a T-shirt! You _______ be joking!—I’m serious．It’s made of silk.