【2014年甘肃省兰州市中考】Bill thought necessary to work with friends and share different ideas.
The math problem was _________ difficult __________ none of us worked it out.
The CD is too noisy. Would you please__________ a little?
______Lily ______Lucy may go to the concert because they have got only one ticket.
I noticed him _________ the teacher’s office just now.
I’d like to go _________on vacation.