[单项选择]We all do more speaking ______, even when we have a break after class.
A. now and then
B. by and by
C. step by step
D. more or less

[单项选择]Even when you have doubts about some people, act as if they are worthy of your best manners.（　）
A. Although some people are rude to you, you should still he polite to them.
B. Even when you suspect some people, behave courteously as if you like them.
C. Even when you are not sure whether some people deserve your politeness, treat them as if they do.
D. Although you don’t trust some people, you should show your politeness to them as if they are trustworthy.

[填空题]We all scream for water when thirsty, but do you know in very hot, dry weather, plants also make{{U}} (36) {{/U}}sounds as if they are crying out for help You see, in a plant stem there are hundreds of water pipes that bring water and{{U}} (37) {{/U}}from the soil all the way up to the leaves. As the ground{{U}} (38) {{/U}}dry, it becomes harder and harder for the plants to do this. In{{U}} (39) {{/U}}draughts, plants have to fight to pull out any water{{U}} (40) {{/U}}. Scientist Robert Winter has found out that when it is really bad their water pipes snap(绷断) from the{{U}} (41) {{/U}}like rubber bands. When that happens, the whole plant vibrates(振动)a little. The snapping pipes make noises ten thousand times quieter than a{{U}} (42) {{/U}}. Robert knows that healthy,{{U}} (43) {{/U}} plants are quiet.{{U}} (44) {{/U}}. How do the insects know which are healthy plants and which are not Robert thinks that the insects may listen for the plants that cry and then they m

[填空题]When we talk about intelligence, we do not mean the ability to get good scores on certain kinds of tests or even the ability to do well in school. By intelligence we mean a way of living and behaving, especially in a new or upsetting situation. If we want to test intelligence, we need to find out how a person acts instead of how much he knows what to do. For instance, when in a new situation, an intelligent person thinks about the situation, not about himself or what might happen to him. He tries to find out all he can, and he acts immediately and tries to do something about it. And if he cannot make things work out right, he doesn’t feel ashamed that he failed; he just tries to learn from his mistakes. An intelligent person, even if he is very young, has a special outlook on life, and how he fits into it. If you look at children, you’ll see great differences between what we call "bright" children and "not bright" children. They are actually two different kinds of people, not just the