What about hiking the mountains?
| A．go, in | B．to go, to | C．going, in | D．goes, to |
The math problem was _________ difficult __________ none of us worked it out.
| A．very; that | B．too; to | C．so; that | D．enough; that |
The CD is too noisy. Would you please__________ a little?
| A．turn it on | B．trun down it | C．turn it up | D．turn it down |
______Lily ______Lucy may go to the concert because they have got only one ticket.
| A．Either; or | B．Neither; nor | C．Not only; but also | D．Both; and |
I noticed him _________ the teacher’s office just now.
| A．go into | B．went into | C．was going into | D．came out of |
I’d like to go _________on vacation.
| A．somewhere relaxed | B．anywhere relaxed |
| C．somewhere relaxing | D．relaxing anywhere |