问题补充：
Yao Ming is 2.26 metres tall. It’s very to find a bed big enough for him.
A. easy
B. important
C. difficult
D. interesting
答案：
A. easy
B. important
(答案→)C. difficult
D. interesting
解析：A. easy 容易的 B. important 重要的 C. difficult困难的D. interesting有趣的；句意：姚明有2.26米高。为他找到一张足够大的床是非常困难的，故选C
