Mary dropped the vase, but her mother stared at her _____ she had done something clever．
| A．in case | B．as if |
| C．so that | D．though |
Public attention at the moment is focused ________ the problem of environment balance.
| A．into |
| B．towards |
| C．about |
| D．on |
The wounded soldier escaped ________ in the fighting.
| A．catching |
| B．being caught |
| C．to be caught |
| D．having caught |
—Hey，look where you are going...
—Oh，I’m terribly sorry.________.
| A．I am not noticing |
| B．I wasn’t noticing |
| C．I haven’t noticed |
| D．I don’t notice |
Forgive him，please. I don’t think he broke your ruler ________.
| A．with care |
| B．for fun |
| C．with aim |
| D．on purpose |
I wasn’t blaming anyone；I ________ said errors like this could be avoided.
| A．merely |
| B．mostly |
| C．rarely |
| D．nearly |