[单选题] Many new houses and tall buildings have been set up for teachers and it ____ an improvement of their conditions.

1、[单选题]I met a friend of ______ yesterday.

• A、Dick’s mother
• B、Dick mother
• C、Dick mother’s
• D、Dick’s mother’s

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2、[单选题]The mere fact ________ most people believe nuclear war would be madness does not mean that it will not occur.

• A、what
• B、which
• C、that
• D、why

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3、[单选题]Although he knew little about the large amount of work done in the field,he succeeded ________ other more well-informed experimenters failed.

• A、which
• B、that
• C、what
• D、where

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4、[单选题]We have studied English for only one year,______ we can perform English short play already.

• A、for
• B、and
• C、yet
• D、or

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5、[单选题]It was not until he arrived at the station ________ he realized he had forgotten his ticket.

• A、that
• B、before
• C、when
• D、after

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