.
John, look at the time. __________ you play the piano at such a late hour ?
| A．Must | B．Can | C．May | D．Need |
Only you step into society can you learn practical things.
| A．while | B．that | C．when | D．as |
John returned with two laborers, with help we finally got the car out of the mud.
| A．their | B．whose | C．which | D．that |
— If I were you, I’d take a bus to work. Taking a taxi is really expensive.
— But today I got up too late.
| A．That’s the problem. | B．You don’t understand. |
| C．Not very. | D．Thank you for the advice. |
Nowadays, some people are suffering from Ebola, which if not , will threaten their lives.
| A．having treated properly | B．to treat properly |
| C．properly treating | D．properly treated |
—Will Helen come to my party tonight?
—I am not sure. She go to the cinema with her father.
| A．shall | B．can | C．may | D．must |