[填空题]A large price increase of some goods will stimulate the growth of their

[填空题]A large price increase of some goods will stimulate the growth of their

[单项选择]Some subsistence activities such as hunting large animals or netting fish require （） to work together.
A. goups are
B. groups which
C. groups
D. that groups

[单项选择]

Some cities grow very large because of two important reasons. First, there may be important natural resources like wood, gas, oil, rivers or harbors near or in the city. Natural resources like wood or oil can be brought to the city and made into products to sell. Other resources, like rivers or harbors help to send the city’s products to other places to be sold. Second, the city may be located in a place where roads and rivers come together. This makes these cities good places to buy and sell goods.
Houston is a city that grew large because it has two important natural resources. They are oil and a good harbor. The oil can be brought to Houston, made into different products, and shipped out of the harbor to other parts of the world.
Chicago is a city that grew very large because of its location at a place where roads, railways, and airways meet. In Chicago, goods can be brought together from all over the country and bought and sold. Then the goods can be loa
A. natural resources
B. convenient traffic
C. population growth
D. A and B

[填空题]Programs of some large television networks will be produced in thousands of places.

[单项选择]In some parts of the world there are large deserts (沙漠). There are no trees (41) water there. Travellers must take (42) .and water with them. The only animal who can walk (43) the desert is the camel (骆驼). He can go (44) food and water for a long time, and can carry heavy things. People call the (45) "the ship of the desert,"
The camel is very big. He has one or two humps (驼峰) on his back, short ears and a long (46) .
The camel’s humps hold fat (脂肪), and his stomach (胃) holds water in twelve deep pockets. Each pocket (小袋,袖珍的) (47) a mouth. When the camel (48) some water, he can get it out of the (49) . The camel’s food is (50) .


A. have
B. has
C. there is