Mary dropped in ____ Mr Smith, but he wasn' t at home, so she went to drop in ____ Mr Smith's office.
| A．on, on | B．at, at | C．on. at | D．at. on |
Students urged that the school library ______open during the long vacation.
| A．be kept | B．kept | C．must keep | D．must be kept |
As a new comer in the city, I’m dying for ______ that is near both my university and the downtown area.
| A．basement | B．furniture | C．occupation | D．accomadation |
She __________ have left school, for her bike is still here.
| A．can’t | B．wouldn’t | C．shouldn’t | D．needn’t |
__________ many times, he finally understood it.
| A．Being told | B．Telling | C．Having been told | D．Having told |
Every evening after dinner, if not ___________ from work, I will spend some time walking my dog.
| A．being tired | B．tiring | C．to be tired | D．tired |