— Could I use your mobile phone, Tim?
— Of course you can, but you ________ use it in the reading room.
A.must | B.mustn’t | C.can | D.couldn’t |
— Could I use your mobile phone, Tim?
— Of course you can, but you ________ use it in the reading room.
A.must | B.mustn’t | C.can | D.couldn’t |