单项选择题

The phrase "be brought forward" in Line 3 most probably means _________.

A．be advanced
B．be completed
C．be expected
D．he introduced
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单项选择题
Professor Laura believes that his research _________.
A．has been supported by many scientists
B．has a profound significance
C．has established a new theory on Vitamin Ｄ
D．has changed people's concept of skin cancer
单项选择题
According to Professor Laura, it would be safer from skin cancer ifyou _________.
A．wore sunglasses when you were out
B．stayed indoors most of the year
C．used sunscreen creams when you were in the sun
D．let yourself be exposed to the sun when the sunlight is not too strong
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