单项选择题

Colonial efforts (to manufacture) glass at Jamestown--and (later attempts) near Philadelphia and Boston--failed despite the (abundant) of fuel and good raw (materials).

A. to manufacture
B. later attempts
C. abundant
D. materials
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单项选择题
Three fundamental aspects of (forest conversation) are the protection of immature trees, the use (of proper) harvesting methods, and (provide) for an environment (that supports) reproduction.
A. forest conversation
B. of proper
C. provide
D. that supports
单项选择题
Part Ⅳ ClozeDirections: In this part, there is a passage with 15 blanks. For each blank, there are 4 choices marked A, B, C and D. Choose the best answer for each blank and mark the corresponding letter with a single bar across the square brackets on your machine-scoring ANSWER SHEET.
A．integrity
B．importance
C．scrutiny
D．insignificance
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