______she is only three years old, she knows a lot of English words.
| A．Before | B．Because | C．When | D．Although |
— Must I answer this question in English?
— No, you_________.
| A．mustn’t | B．needn’t | C．can’t | D．shouldn’t |
— Lisa, we need to clean the kitchen. Could you _________ the trash?
— Yes, sure.
| A．take after | B．take off | C．take place | D．take out |
Helen has two sisters and a brother. Her brother is working, but _________her sisters are still at school.
| A．neither | B．either | C．all | D．both |
Now the train service is very good. The trains are _________on time.
| A．hardly | B．always | C．never | D．sometimes |
_________ March 28, about 20 Chinese cities turned off lights of major buildings for one hour.
| A．At | B．In | C．On | D．Of |