I apologize if I__________you，but I assure you it was unintentional(无意的).
| A．offend | B．had offended |
| C．should have offended | D．might have offended |
It is important to remember that success ________ a sum of small efforts made each day and often ________ years of achieve.
| A．is; takes | B．are; takes |
| C．are; take | D．is; take |
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 |