Robots will do the simple jobs over and over again, they won’t be bored.
| A．some times | B．some day |
| C．time and time again | D． many times |
The _____ traffic stopped me from going to school on time yesterday. I was late!
| A．heavy | B．crowded | C．fast | D．quick |
In hot summer, we should pay attention to protecting ourselves _____ strong sunlight.
| A．from | B．for | C．with | D．to |
Beijing has got_____ population of more than 13.8 million.
| A．the | B．a | C．an | D．/ |
“Everybody is playing basketball outside. Can I join them, Dad? ”
“_____________, you must finish your homework first. ”
| A．Why not? | B．Will you | C．I’m afraid not | D．I hope not. |
“What are you doing , Amy?” “I want to ________ these pictures on the wall.”
| A．put on | B．put up | C．put out | D．put down |