-My mathematics is very poor.
-Don’t worry. I’ll help you ______ I can.
| A．as far as | B．as soon as |
| C．as quickly as | D．as possible as |
________, the boy couldn't enter his house.
| A．Since the key has lost | B．The key been lost |
| C．Lost the key | D．Having lost the key |
Time________, I can have done it better.
| A．permit | B．be permitted | C．permitting | D．to permit |
_______the exam, the boy was punished by his father.
| A．No passing | B．Having passed | C．Not passing | D．Not having passed |
________hard before, Tom is afraid of failing in the exam.
| A．Having been worked | B．Not to have worked |
| C．Having never worked | D．Never have worked |
The brave man died,________ his young wife nothing but a________ cottage.
| A．left; breaking | B．leaving; broken | C．left; broken | D．to leave; breaking |