Of one thing I am certain _____ hard work contributes to good results.
| A．as | B．what | C．which | D．that |
This is a common mistake ____ students.
| A．between | B．over | C．among | D．about |
If you run ____ two hares you will catch neither.
| A．into | B．after | C．off | D．out of |
His grandfather died ____ the wound that the enemy soldier had given him .and then his grand-
mother died ____ hungry and cold.
| A．from,of | B．of,from | C．from,from | D．of.of |
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 |