Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ______ we should deal with properly.

She used to _____ late, but now she is used to ____early in the morning.

Do you like.talking with your friends on the telephone or the mobile phone— . I enjoy using QQ.

_____ is it from your home to school —17 minutes’ by bus.

There was _______terrible earthquake in 2011 in Japan!It killed _______ people.