(格式最好是：句意+原因/语法点）

题目

(格式最好是：句意+原因/语法点）
1、If you compare food costs today _____ of a year ago,you will find the difference.
A.to that B.to them C.with that D.with those
帮分析一下A哪错!
2、Only _____ as an interpreter______ how important it is to grasp English
不打选项了,问：when I worked;did I realize 为何对?
3、It was the training ____ he had as a young man ____ made him such a engineer.
A.what;what B.which;that C.that;which D.that;what
4、it was 和 was it 有何区别?
以上题做题的技巧是神马?Thanks!

答案