Instruction

Select the best answer to complete the sentence.

1. For -------- information, ask the secretary at front desk.

2. Please refrain -------- using a mobile phone.

3. I would -------- if you would reply to me back as soon as possible.

4. It is impossible -------- human beings to predict the earthquakes at present.

5. Any visitors to our company must sign in at -------- the guard office or the entrance of the building.

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