Thedaysaregoneweuse“foreignmatches”.A.duringwhenB.duringthatC.onwhichD.duringwhich（附上解析）

Question

The days are gone _____ we use “foreign matches”.
A.during when B.during that
C.on which D.during which
（附上解析）

Answer 1

选D.
正常语序是The days during which we used "foreign matches" are gone.因为定语从句使句子头重脚轻,所以放到了后边.
when是关系副词,前面不能有介词,所以否掉A.
that作关系代词时,不能紧跟在介词后,所以否掉B.
应该说during the days,而非on the days,所以否掉C.