1) to keep a) to do b) doing 2) to decide  a) to play b) playing 3) to pretend a) to sing b) singing 4) to refuse a) to eat b) eating 5) to avoid a) to meet b) meeting 6) to end up a) doing homework b) to do homework 7) to fail a) to test b) testing 8) to risk a) to be sick b) being sick 9) to prefer a) watching b) to watch

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