题目内容：

Where are the Bees?

Bees are essential to the production of food we eat. Bees make honey, but they also pollinate (授粉) large areas of _______ such as strawberries, apples and onions. About a third of the food we eat is a(n) _______ of pollination of the bees. _______, bees have been disappearing at a(n) _______ rate.

In 2006, beekeepers started reporting about something called Colony Collapse Disaster (CCD). The main sign of CCD is the _______ of adult honey bees from a hive. In October of 2006, some beekeepers reported that they had lost between 30 and 90 percent of their hives.

There were many _______ for the disappearance of the bees. But the most convincing one has been _______to pesticides (杀虫剂) and lifestyles of bees today. Nowadays beekeepers get most of their income not from _______ honey but from renting bees to pollinate plants. This means that the life of the typical bee now _______ travelling all around the country to pollinate crops as the ________ change. That means a lot of traveling on trucks, which is very ________ to bees. It is not ________ for up to 30% of the hive to die during ________ due to stress. In addition, bees that spend most of their time locked up on trucks are not ________ what they usually live on. ________, they live on a sweet liquid from corn, usually polluted with pesticides.

The ________ reason for the disappearance of bees is not sure, but losing bees is very ________ to the economy. The bee pollination services are ________ over 8 billion a year. With no bees, pollination will have to be done ________, which would have effects on the quality of food and increase food prices. We hear a lot about big environmental disasters almost every day. ________ one of the biggest may well be the loss of that tiny flying insect.

1.A.flowers B.trees C.crops D.grass

2.A.protection B.result C.power D.impact

3.A.Eventually B.Accidentally C.Interestingly D.Unfortunately

4.A.alarming B.moderate C.amusing D.reasonable

5.A.escape B.loss C.boom D.growth

6.A.chances B.theories C.adjustments D.excuses

7.A.applied B.associated C.related D.involved

8.A.producing B.buying C.keeping D.processing

9.A.includes B.consists C.considers D.stands

10.A.beekeepers B.behaviors C.prices D.seasons

11.A.beneficial B.acceptable C.stressful D.familiar

12.A.likely B.necessary C.unusual D.common

13.A.flight B.circle C.stay D.transport

14.A.interested in B.exposed to C.accustomed to D.hunting for

15.A.Thus B.Otherwise C.Therefore D.Instead

16.A.exact B.extra C.complex D.original

17.A.essential B.dangerous C.insignificant D.costly

18.A.demanding B.remaining C.worth D.valuable

19.A.by chance B.by hand C.in time D.in turn

20.A.But B.For C.Or D.So