Instruction
Select the best answer to complete the sentence.
1. The lion -------- to the same family as the cat.
2. You can complete the project without -------- difficulty only if you do it by next week.
3. -------- with similar models, this car has the best fuel efficiency.
4. The number of department staff was doubled to deal with the system trouble caused ------- large-scale blackout.
5. John could not but -------- at the fun.
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