—Must I hand in the weather report this morning?--No, you__.A. mustn't B. needn't C. may not
I swam in the river and caught a small fish yesterday afternoon. ----_____
---how many students are there in the classroom? ---_____Idon’t know where they have gone.
Our playground is not so tidy and beautiful as before. Students must _____ dirty things on it.
I _____ this book for two weeks. I have to return it now.
—Do you think a radio is useful in learning English? —Sure. A radio can _____ listening English songs and reports.