That clever boy regards the problems________challenges．
| A．as |
| B．of |
| C．for |
| D．to |
It rained yesterday. And we stopped playing basketball __________ the rain.
| A．because | B．because of | C．so | D．so of |
I was born_________1998 and my brother was born ________ March 7th, 2000.
| A．on, in | B．at, on | C．by, in | D．in, on |
—Where does your brother study? —He studies in ________ university.
| A．a | B．an | C．the | D．/ |
He decides to work _______ than last year.
| A．more hard | B．much hard | C．much harder | D．a little hard |
－I’m going to learn the piano when I retire.
－That sounds _________ a good idea.
| A．like | B．as | C．about | D．of |