We’ll talk about some cases_______ driversobviously knew the traffic rules but didn’t obey them.

We are going to Beijing. Can you _________when the train will leave

. Not only should you get used ______ underdifficult conditions but you also you pay more attention ______ your work well.

Like most of my schoolmates, I have neither brothers nor sisters—____,I’m an only child

Success _________three key factors: diligence, talent and luck, of which the first one is of great importance .