If space is not available on the flight that the passenger desires,it is advisable that the agent be able to suggest( ).

单选题

If space is not available on the flight that the passenger desires,it is advisable that the agent be able to suggest( ).

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单选题

If possible, always tell your reader what can occur if the safety instruction is not obeyed.

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单选题

IF THE SCRATCH DOES NOT (go through) THE PROTECTIVE LAYER, THE UNIT IS SERVICEABLE.

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单选题

If the adjustment of the stops is not correct, the results of the test will not be accurate.

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单选题

It is important to ask for__ if you do not Understand what the problem is.

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