You should understand the traffic rule by nowYou’ve had it ________ often enough

We live in a society _______ there is a greatdeal of debate about competition

_____, I would like to thank Professor Osterhaus for offering me the chance to do this study, and for all the support throughout the study period. [ ]

It’s beliefthat parents have to spend nearly 500,000 yuanbringing up a child in China nowadays[ ]

Everything seemed _______ so fast and nowit’s all over.