My pain ___________ obvious the moment I walked into the room, for the first man I met asked me pitifully:" Are you feeling all right?"
| A．must be | B．must have been |
| C．could be | D．could have been |
Human facial expressions differ from those of animals in the degree ______ they can be controlled on purpose.
| A．with which | B．to which | C．of which | D．for which |
Chan’s restaurant on Baker Street, ______ used to be poorly run, is now a successful business.
| A．that | B．which | C．who | D．where |
Those successful deaf dancers think that dancing is an activity ________ sight matters more than hearing.
| A．when | B．whose | C．which | D．where |
It is reported that two schools，_______ are being built in my hometown，will open next year.
| A．they both | B．which both | C．both of them | D．both of which |
Some pre-school children go to a day care center, __________ they learn simple games and songs.
| A．then | B．there | C．while | D．where |