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

1、[单选题]You were silly not ________ your car.

• A、to lock
• B、to have locked
• C、locking
• D、having locked

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2、[单选题]Sarah, hurry up. I’m afraid you can’t have time to ________ before the party.

• A、get changed
• B、get change
• C、get changing
• D、get to change

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3、[单选题]Having a trip abroad is certainly good for the old couple, but it remains ________ whether they will enjoy it.

• A、to see
• B、to be seen
• C、seeing
• D、seen

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4、[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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5、[单选题]Don’t leave the water ________ while you brush your teeth.

• A、run
• B、running
• C、being run
• D、to run

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