Having failed in many attempts，the bird managed to escape from the cage．
| A．suddenly | B．naturally |
| C．immediately | D．eventually |
Video games can be a poor influence if ________ in the wrong hands.
| A．to leave | B．leaving |
| C．leave | D．left |
You have to know ________ you're going if you are to plan the best way of getting there.
| A．what | B．that |
| C．where | D．who |
It was so noisy that we hear ourselves speak.
A. couldn’t B. shouldn’t
C. mustn’t D needn’t
Have you ever heard of the trees that are homes animals both on land and sea?
| A．about | B．to |
| C．with | D．over |
Tom had to______ the invitation to the party last weekend because he was too busy.
| A．turn in | B．turn down |
| C．turn over | D．turn to |