1．They have taught a new trick to the ________ (海豚)．
答案：dolphin
2．She was overcome with ________ (情绪) and burst into tears.
答案：emotion
3．My ________ (皮肤) is getting a little dry recently.
答案：skin
4．He was an u________ man with great business talents and a kind heart.
答案：unusual
