Instruction
Select the best answer to complete the sentence.
1. The marketing department needs to rethink and review the value of the product and reprice it -------- .
2. The number of department staff was doubled to deal with the system trouble caused ------- large-scale blackout.
3. I feel sick, I shouldn't -------- so much.
4. Any visitors to our company must sign in at -------- the guard office or the entrance of the building.
5. Do not be afraid of -------- mistakes when you speak in a foreign language.
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