Trees ____ fight air pollution．They are natural air conditioners．
| A．should | B．must | C．need | D．can |
She’s _____________ girl.
| A．an fifteen-years-old | B．a fifteen-year-old |
| C．a fifteen-years-old | D．an fifteen-year-old |
—What do you ____________ your English teacher?
— Wow, she’s very friendly.
| A．think of | B．think over | C．think | D．think about |
______name is Bob. _______is eleven years old.
| A．He, His | B．His, His | C．His, He | D．He, He |
—__________ do you have your piano lessons?
—On Wednesday.
| A．Where | B．What | C．When | D．How |
I usually take a shower_____________ a quarter past eight in the evening.
| A．in | B．on | C．at | D．to |