Food safety is important. Rules to stop people from food pollution.
A、must make B、must be made C、can’t be made
By the end of last week, she______in the west of China for two months helping the homeless children.
| A．will stay | B．has stayed |
| C．would stay | D．had stayed |
Susan and Lily______tomatoes a nd other vegetables on the farm this time yesterday.
| A．pick | B．are picking |
| C．will pick | D．were picking |
The robot can help me sweep the floor. smart invention it is!
| A．What | B．What a |
| C．What an | D．How |
Aunt Lucy will tell us something about her trip to Australia when she______back.
| A．came | B．comes |
| C．would come | D．will come |
John didn’t give up looking for a job __________ he got an offer from a German company.
| A．until | B．since |
| C．because | D．if |