Have you heard that George quit his job? —Yeah, but I can’t why he did so．

Listen, there is some strange noise.This machine must be________.— I think so.You must have it checked[ ]

The schools themselves admit that not all children willbe successful in the jobs ____they are beingtrained.[ ]

__________ , some students tend to develop a range of unhealthy habits .

Why didn’t you go to the party last night – I __________.