单项选择题

Exposure to asbestos fibers can cause cancer_____

A．only when asbestos is used in building industry
B．only when it is used in large quantities
C．even if it is used in small quantities
D．if they are used when wet rather than dry
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单项选择题
Evidence from. the economists and the building industries shows that______
A．exposure to asbestos fibers is cancer-causing
B．asbestos is in extensive use in building industry
C．use of asbestos is being reduced gradually
D．exposure to asbestos fibers can he reduced significantly
单项选择题
What can we infer from paragraph five in this passage______
A．Small size often means lack of virtue and merit
B．The University Colleges and Institutes are not human and personal
C．Some doubts exist among students, parents and sponsor about the quality of the degrees awarded by the University Colleges and Institutes
D．Most University Colleges and Institutes have attractive campuses
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