第一部分 单项填空（共15小题；每小题1分，满分15分)
请从A、B、C和D四个选顶中选出可以填入空白处的最佳选项，并在答题卡上将该选项的标号涂黑。
例：A computer can only do ______ you have instructed it to do.
A. how B. after C. what D. when
答案是C。
1. When ______ to danger and conflict, men tend to increase blood pressure, feeling nervous or anxious.
A. expose B. exposed C. to expose D. exposing
2. He felt satisfied; he could the way she looked that if he pushed her hard enough she would come in with him.
A. care about B. believe in C. tell by D. give up
3. Reduce it ______ half each month and before you know it, you will not be thinking of
