[单项选择]All ______ is a continuous supply of raw materials.
A. what is needed
B. thing needed
C. that is needed
D. is needed

[单项选择]All _______ is a continuous supple of raw materials.
A. what is needed
B. thing needed
C. that is needed
D. is needed

[单项选择]All（）is needed is a continuous supply of fuel oil.
A. what
B. that
C. which
D. this

[单项选择]All ______ is a continuous supply of fuel.
A. what is needed
B. the thing needed
C. that is needed
D. for their needs

[单项选择]All ______is a continuous supply of electric power.
A. that is needed
B. what is needed
C. which is most important
D. for our needs

[单项选择]All ______ is needed is a continuous supply of the basic necessities of life.
A. what
B. that
C. it
D. which

[单项选择]All ______ is a continuous supply of fuel oil.
A. what is needed
B. that is needed
C. the thing is needed
D. for heir needs

[单项选择]All ______ is a continuous supply of the basic necessities of life.
A. what is need
B. for our needs
C. the thing needed
D. that is needed

[单项选择]All ____________ is a continuous supply of fuel oil.
A. the thing needed
B. what is needed
C. that is needed
D. for their need

[单项选择] Exports are either raw materials or manufactured goods. Raw materials are products of the land， such as cotton， timber or rubber. Some raw materials， such as iron ore， come from mines. These raw materials are often exported by the countries that produce them to other countries where they are made into manufactured goods. Some countries produce food for export， for example， meat， sugar， or cereals such as wheat and maize. These countries are agricultural countries. An agricultural country needs fertile land and a good climate. A cold， dry climate is not suitable for agriculture. A country which produces manufactured goods is known as an industrialized country. An industrialized country cannot always produce enough food for its own needs. In this case， it does not export foodstuffs. Instead it has to import them. It relies on exports of manufactured products and pays for imports with the money it earns from the exported goods. Raw materials are often exported by the countries that produce them to other countries where（）.
A. they are consumed
B. they are made into finished products
C. they are wasted