单项选择题

The two most important ________ in making a cake are flour and sugar.

A．elements
B．components
C．ingredients
D．constituents
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单项选择题
The elderly Russians find it hard to live on their state ________.
A．pensions
B．earnings
C．salaries
D．donations
单项选择题
The environment is everything that surrounds us; plants, animals, buildings, country, air, water, everything that can affect us in any way.
A．excessively
B．distinctly
C．approximately
D．virtually
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