Look! There are some birds ______ in the sky. They are very

What is known about the influenza virus?

A. It was first found in a group of very old birds.

B. All the different strains can be found in wild birds.

C. It existed over 100 million years ago.

D. It can survive in many different places.

Most animals have little connection with animals of different kind, unless they hunt them for food. Sometimes, however, two kinds of animals come together in a partnership ( 伙伴关系 ) which does good to both of them. You may have noticed some birds sitting on the backs of sheep. This is not because they want a ride, but because they find easy food in the parasites (寄生虫 ) on sheep. The sheep allow the birds to do so because they remove the cause of discomfort. So although they can manage without each other, they do better together.

Sometimes an animal has a plant partner. The relationship develops until the two partners cannot manage without each other. This is so in the corals ( 珊瑚 ) of the sea. In their skins they have tiny plants act as "dustman", taking some of the waste products form. the corals and giving in return oxygen which the animal needs to breathe. If the plants are killed, or are ever prevented from lighting so that they cannot live normally, the corals will die.

1、Some birds like to sit on a sheep because ( ).

A、they can eat its parasites

B、 they depend on the sheep for existence

C、 they enjoy traveling with the sheep

D、 they find the position most comfortable

2、The underlined word "they" in the last sentence of the first paragraph refers to ( ).

A、birds and parasites

B、birds and sheep

C、parasites and sheep

D、sheep, birds and parasites

3、What does the second paragraph mainly discuss? ( )

A、Some animals and plants depend on each other for existence.

B、 Some animals and plants develop their relationship easily.

C、 Some plants depend on each other for foo

D、 Some animals live better together.

4、What does this article talk about? ( )

A、Two kinds of animals for a partnership.

B、Most animals only have connection with animals.

C、The connection between the living things.

D、Corals have some connection with plants.

A.It is going to rain pretty soon

B.Y ou look very beautiful

C.The red dress fits me very much

A、look up

B、consult

C、conduct

D、look for

A、policemens / fishermens

B、policemen/ fishermen

C、policeman/ fisherman

D、policemans/ fishermans

Scinentists jumped to the rescue with some distinctly shaky evidence to the effect that insects would eat us up if birds failed to control them。

A、have gone

B、have been gone

C、be gone

D、be going

30． Which is right according to the passage?

A． People have too much time to talk with each other．

B． Life now is very simple．

C． Some families have become single-parent families．

D． Lots of mothers stay at home and look after their children．

I want to look for a smart phone priced about 1000 Yuan. Do you have some to recommend?

A、 Of course, please take a look at this one

B、 It is very kind of you

C、 Thank you

Some birds will fly away to the south in winter, while _____ will stay with you.

A. another

B. the others

C. others

D. other ones