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Swimming with someone else is ___________ swimming on your own. (safe)
Swimming with someone else is SAFER THAN swimming on your own.
After I had done some housework, the house looked much ________ before. (clean).
After I had done some housework, the house looked much CLEANER THAN before.
The hotel is _________ in the summer ______ in the spring. (full).
The hotel is FULLER in the summer THAN in the spring.