1.He took an active part in the English speaking contest.= He____ in the
问题描述：
1.He took an active part in the English speaking contest.= He____ in the
English speaking contest _______.
2.There is something wrong with my neck.= There is somrthing _____ _____
with my neck.
答
1.joined...actively
2.the matter
这两个句子替换,尤其是后者,不是在考语法,而是“回”字的第四种写法.