Instruction

Select the best answer to complete the sentence.

1. Please leave a window -------- till I come back home.

2. Please take care of these -------- orphaned children.

3. -------- with similar models, this car has the best fuel efficiency.

4. Mary spends all her time either playing games -------- watching YouTube videos on the weekend.

5. I have a lot of -------- to do today.

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