—Must I finish the exercise this afternoon?—Yes, you ______, but you ______ finish it now.
—___________ 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.
The houses in big cities are very _______.I can't afford(负担)them.