His funny hat made the students _____ in class.
You should return the digital camera to Sally ________she will get angry.
He couldn't _________an answer when I asked him why he was late.
--Could I________ your CD player, please? --Sorry . _________is broken.
--Do you want one way ________ round-trip?--Round -trip. We'll return __________December 8th.
--Surfing first started on the islands of Hawaii, didn't it?--Yes, but now it ______ by people all over the world.