A. Because Chinese successfully integrated into American.
B. Because Chop Suey was introduced into American.
C. Because Chinese food was modified to suit Americans’ taste.
D. Because Chinese cooks made it less spicy.

A. We could breathe as easily as usual.
B. We could carry on a short conversation.
C. The aerobic curve occurs at the end of the exercises.
D. The aerobic curve occurs in the middle of the exercises.