— Hello, may I speak to Mr. Wu? — I’m afraid he is not in now. ______ I take a message?

(2012·重庆高考)—________ you interrupt now? Can't you see I'm on the phone?—Sorry Sir, but it's urgent.

 One of the rules is that every student ________ wear school uniform while at school.

---Mum, could I go shopping with you? --- Yes,________ . But you have to finish your homework first.

If you don't know the word, you can _____ in the dictionary.