--- that he picked up French?
--- It was in 2010 he traveled in France.
A. Was it when; that
B. When was it; that
C. Was it when; when
D. When was it; when
网友回答
A. Was it when; that
B. When was it; that
C. Was it when; when
(答案→)D. When was it; when
解析：句意：---他是什么时候学会法语的？---是2010年去法国旅游的时候。这是一个强调句型的特殊疑问句。句式是：特殊疑问词+is/was+it+that+其它，所以只能选B或D。第二空是引导一个定语从句，在从句中做时间状语，用when.。故选D。