Instruction

Select the best answer to complete the sentence.

1. One of the engineers says there is a -------- of maintaining the system.

2. John is not used to -------- up late.

3. The price of smartphones is now lower -------- the severe competition among electronics manufacturers.

4. The new project of R&D department is not moving -------- fast as we hoped unfortunately.

5. My uncle showed me a few --------.

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