I listened to Dr．Wilson's lecture about the protection of wild animals, but I was unable to grasp its key .
| A．thoughts | B．points | C．notes | D．dots |
Jack needs ___ the composition again.
| A．to write | B．writing | C．to be written | D．to writing |
Now plastic has been widely used ___ wood and metal.
| A．in the place of | B．instead | C．in place of | D．instead for |
“Must I do the work right now, Mom?” “No, you ___. You may do it tomorrow.”
| A．mustn’t | B．must | C．needn’t | D．shouldn’t |
An ant has two ___.
| A．stomaches | B．stomachs | C．stomackes | D．stomacks |
Tom’s mother said; “Nobody can prevent him ___ smoking.”
| A．for | B．from | C．in | D．about |