填空题 Read the following tongue twisters.

填空题 Good cookies could be cooked by a good cook; if a good cook could cook good cookies.

填空题 A big black bug bit a big black bear and made the big black bear bleed blood.

填空题 Peter Piper picked a peck of pickled peppers. A peck of pickled peppers Peter Piper picked. If Peter Piper picked a peck of pickled peppers, where's the peck of pickled peppers Peter Piper picked?

填空题 Betty Botter bought some butter. "But," she said, "the butter's bitter. If I bake this bitter butter, it would make my batter bitter. But a bit of better butter will make my batter better." So she bought a bit of butter, better than her bitter butter.