[单选题] ________ much is known about what occurs during sleep,the precise function of sleep and its different stages remains largely in the realm of assumption.

1、[单选题]Last summer I took a course on ______

• A、how to make dresses
• B、how dresses to make
• C、how to be made dresses
• D、how dresses to be made

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2、[单选题]The water will be further polluted unless some measures ______

• A、will be taken
• B、are taken
• C、were taken
• D、had been taken

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3、[单选题]If you need any money,I’ll lend you ______

• A、one
• B、it
• C、those
• D、some

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4、[单选题]The computer has brought about surprising technological changes ________ we organize and produce information.

• A、in a way
• B、in the way in which
• C、in that way
• D、in no way

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5、[单选题]We were struck by the extent ________ which teachers’decisions served the interests of the school rather than those of the students.

• A、to
• B、for
• C、in
• D、with

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