[单选题] The disc, digitally ________ in the studio, sounded fantastic at the party that night.

1、[单选题]________ such heavy pollution already, it may now be too late to clean up the river.

• A、Having suffered
• B、Suffering
• C、To suffer
• D、Suffered

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2、[单选题]Having been ill in bed for nearly a month, he had a hard time ________ the exam.

• A、pass
• B、to pass
• C、passed
• D、passing

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3、[单选题]________ the programme, they have to stay there for another two weeks.

• A、Not pleting
• B、Not pleted
• C、Not having pleted
• D、Having not pleted

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4、[单选题]The disc, digitally ________ in the studio, sounded fantastic at the party that night.

• A、recorded
• B、recording
• C、to be recorded
• D、having recorded

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5、[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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