—Look at the sign!
—Oh, I see.We _______ waste water.
A. can B. must C. mustn’t D. needn’t
—Didn’t you finish your homework last night?
—_______, though I wasn’t feeling well.
A. No, I hadn’t B. Yes, I had
C. No, I didn’t D. Yes, I did
Mrs Smith has a cute baby. It often smiles at people ________.
A. friendly B. lovely C. happily D. lively
—Mum, can we go to the art museum tomorrow?
—Sure. But first we should find out ________.
A. what can we do B. where we can go
C. how can we go there D. if it will be open
My grandparents like to live in a house _______ is not very big but bright and comfortable.
A. that B. who C. what D. whose
—What a big storm last night!
—Yes. I was doing my homework. Suddenly, all the lights in my house _______.
A. went off B. turned off C. took off D. got off
