-Has Tommy finished his homework yet?
-I have no idea; he ____ it this morning.
| A．was doing | B．had been doing | C．has done | D．did |
Minister Bill De Blasioin office fewer than 48 hours when he came face to face with his biggest challenge in his life．
| A．has been | B．had been | C．would be | D．is |
Going into a supermarket without a clear list, you mightpicking up what you wouldn't necessarily want．
| A．give up | B．take up | C．make up | D．end up |
—1 wonder if Sue will be here by five．
—Don't worry ! She just went to collect her kids．Shebe back by then．
| A．should | B．can | C．would | D．might |
As a leading producer of greenhouse gases, Chinathe United States as the largest consumers of energy．
| A．describes | B．joins | C．controls | D．influences |
The song Take Me Home, Country Roads has muchto people, for few people can avoid getting caught up in its originally real country music．
| A．appeal | B．access | C．potential | D．devotion |