. The topic sentence of Para. 2 is ______.
A.he didn't know what to do with himself B.he went on holiday to interesting places with his wife C.he was unhappy after he got retired D.none of them正确答案C
. The topic sentence of Para. 2 is ______.
A.he didn't know what to do with himself B.he went on holiday to interesting places with his wife C.he was unhappy after he got retired D.none of them正确答案C
