People wondered how such a silly and careless mistakes _______. [ ]

He seldom has lunch at school, ________?

－Hi, can I help you －_______.

I paid a visit to the small town last week where I was born,which I hadn’t visited for years.

It will be very quick to travel from Zhanjiang to Shenzhen by taking the newly-built high speed railway.—Yes. It’s said that _______ will be enough.