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Questions 1 to 4 are based on the conversation you have just heard.
1
A.The collection of precious metals.
B.A standard measuring weight unit.
C.The value of precious metals.
D.A new metric system of measurement.
2
A.Checking the accuracy of scales.
B.Calculating the density of metals.
C.Observing humidity of atmosphere.
D.Measuring amounts of rainfall.
3
A.It has been rusty.
B.It was not scientific.
C.It was of low quality.
D.It was out of date.
4
A.It is very cheap.
B.It is difficult to say.
C.It is too expensive.
D.It is reasonable.
