问题补充：
－How many would you like?
－Two, please. I have a friend here.
A. cup of tea
B. cup of teas
C. cups of tea
D. cups of teas
答案：
A. cup of tea
B. cup of teas
(答案→)C. cups of tea
D. cups of teas
解析：句意：你想要多少杯茶？——两杯。我这儿有个朋友。结合语境可知本句中cup用复数形式，tea是不可数名词，故没有词形变化。选C。
