28. What can we infer from the last paragraph?

A. The world is changing faster than ever

B. People have stronger senses than before

C. The world is more complex than it seems

D. People in Darwin's time were more Imaginative.

　　　　　　　　　　　　　　　　　　　　　　C

　　Every time you go shopping, the vegetables and fruit look so tempting(诱人) that you wish you could buy all of them. Some people are lucky and can grow the fruit and vegetables in the gardens that they have. While getting fresh vegetables, they can also achieve great cost cutting.

　　 Mushrooms are expensive and can also go bad very quickly. Mushrooms can also be grown easily in a dark environment. In fact it's better than growing other vegetables since you really don't need an outdoor space. A special type of soil that is good for growing mushrooms is easily available.

　　Actually mushrooms aren't even vegetables; they are fungi(菌类) and for this reason, you don't even require sunlight to grow them. Well how does one go about growing mushrooms? You could always Google"growing mushrooms" and you will find a number of mushroom growing kits(工具) available online that are effective and not very expensive either.

　　Mushrooms can be added to any dish that you cook. Simply use them in pizzas, salads and anything that you pretty much fancy(想像). Grow mushrooms in your own house and use them whenever you want. Fresh mushrooms are tastier than the ones that are stored in your refrigerator.

　　 If you have had a really good crop of mushrooms, then you can even store them. Ideally you should use the white variety of the mushrooms. Simply pick them, slice them and put them on a cookie sheet in a freezer. When they are frozen, you can use them when you want to. Remember to thaw(解冻) them before you use them, and they will give a really great taste to the dish that you are making.

29．What can we know about growing mushrooms?

　　A．It takes much attention B．It needs lots of sunshine

　　C．The soil can be got easily D．The environment is demanding

30．What is the author's attitude towards growing vegetables in gardens?

　　A．Doubtful B. Supportive C. Objective D. Disapproving

31．What could be the best title for the text?

A. Simple to Cook Mushroom Pizzas