This factory produced much dirty water, which resulted in a wide______of environmental problems.
We are looking forward to ______ another chance ______ it again.
You can keep the book until you ______ .
You'll regret ______ those words. You may hurt her feelings.
Though he failed, he tried _______ it again and again.
You didn't hear us come back last night. That's good. We tried ______ noisy.