-Do fish sleep? I think they’re swimming around . -Of course they sleep. But they sleep with their eyes open.
—What shall we do after finishing our homework?—How about __________music?
—___________ did you see in the picture?—Nothing.
I wrote down __________ about writing just now.
My students are interested ______ reading.
The street was too noisy and we couldn’t _______ the singer clearly.