10．－Have you been to the Great Wall?
－Perhaps not in my memory. _______ , it might have been during my early childhood.
| A．If any | B．If ever | C．If so | D．If not |
His parents are very concerned about his son at school because he _______moving in his seat.
| A．is always keeping | B．always keeps | C．does keep | D．has always kept |
--- _____ the population of China? --- About 1.3 billion.
| A．What is | B．How many are | C．How much is | D．What are |
We look forward to the day when motorcars will be replaced by some less dangerous ____ of transport.
| A．means | B．methods | C．manners | D．ways |
Mother _________father to give up smoking, but she failed.
| A．persuaded | B．tried to persuade | C．suggested | D．to tell |
— Hey, buddy, let’s go, remember the movie, Up(飞屋环游记)?
— Sorry, I’m busy .How about ________ ?
| A．every other day | B．the other day | C．any other day | D．a rain check |