–Has your father returned from Africa yet?
–Yes, but he _____here for only three days before his company sent him to Australia.
| A．has been | B．will be | C．would be | D．was |
The teacher is not only strict ____ his pupils but also strict ____ his own work.
| A．with, with | B．in,in | C．in, with | D．with, in |
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 |
The worker can make chairs ____ wood, and also can make paper ____ wood.
| A．from, of | B．of, from | C．of. of | D．from, from |
The teacher is writing ____ a piece of chalk on the blackboard while the students are writing ____ink in exercise books.
| A．with, in | B．in, with | C．in, in | D．with, with |
—You know. Bob is a little slow ____ understanding, so…
— So I have to be patient ______ him.
| A．in ; with | B．on; with | C．in; to | D．at; for |