Beginner Level 初级 (chūjí)
Correct answer: B
Analysis:
A. “氧气 (yǎngqì)” are the Chinese characters for “oxygen.”
“氧 (yǎng)” means oxygen and “气 (qì)” means smell.
B. “空气 (kōngqì)” are the Chinese characters for “air.”
“空 (kōng)” means empty and “气 (qì)” means smell.
C. “气味 (qìwèi)” are the Chinese characters for “smell.”
“气 (qì)” means smell and “味 (wèi)” means flavor.
D. “气球 (qìqiú)” are the Chinese characters for “balloon.”
“气 (qì)” means smell and “球 (qiú)” means ball.