Trees are good for man. We can’t plant them ______ many.
| A．so | B．such | C．too | D．enough |
13. Don’t play by the river _______ you fall in and drown!
| A．in case | B．so that | C．in order that | D．when |
12. 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 |
11. ____ you’re got a chance, you might as well make full use of it.
| A．Now that | B．After | C．Although | D．As soon as |
10. ________ her faults, she’s Arnold’s mother. Don’t be so rude to her.
| A．whatever | B．What | C．Whichever | D．Whenever |
9. Mary clapped her hand over her mouth _______ she realized what she had said.
| A．while | B．as soon as | C．suddenly | D．then |