Don’t play by the river _______ you fall in and drown!
| A．in case | B．so that |
| C．in order that | D．when |
I thought she was the very girl that I should marry _______ I met her.
| A．first time | B．for the first time |
| C．the first time | D．by the first time |
________ her faults, she’s Arnold’s mother. Don’t be so rude to her.
| A．whatever | B．What |
| C．Whichever | D．Whenever |
Mary clapped her hand over her mouth _______ she realized what she had said.
| A．while | B．as soon as |
| C．suddenly | D．then |
_____ she goes, there are crowds of people waiting to see her.
| A．Wherever | B．however |
| C．Whichever | D．Whoever |