___________ that he was in great danger, Eric walked deeper into the forest．
| A．Not realized | B．Not to realize | C．Not realizing | D．Not to have realized |
If it was not an accident, he must have done it .
| A．on purpose | B．in common | C．on occasion | D．in time |
Many students signed up for the race in the sports meeting to be held next week.
| A．800-metre-long | B．800-metres-long | C．800 metre length | D．800 metres length |
She is not worth .
| A．to get angry | B．getting angry | C．getting angry with | D．to get angry with |
His remarks left me about his real purpose.
| A．wonder | B．wondering | C．to wonder | D．wondered |
his father had come, his face lit up.
| A．Having heard | B．When he heard | C．Hearing | D．When hearing |