[单选题] They haven’t arrived yet but we _____ them at any moment.

1、[单选题]The research is so designed that once ________ nothing can be done to change it.

• A、begins
• B、having begun
• C、beginning
• D、begun

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2、[单选题]Reading is an experience quite different from watching TV; there are pictures ________ in your mind instead of before your eyes.

• A、to form
• B、form
• C、forming
• D、having formed

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3、[单选题]The news reporters hurried to the airport, only ________ the film stars had left.
to tell
to be told
telling
told

• A、to tell
• B、to be told
• C、telling
• D、told

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4、[单选题]When flint ________ to the market, these products enjoyed great success.

• A、introducing
• B、introduced
• C、introduce
• D、being introduced

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5、[单选题]The man insisted ________ a taxi for me even though I told him I lived nearby.

• A、find
• B、to find
• C、on finding
• D、in finding

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