It is worth considering what makes “convenience” foods so popular, and ________ better ones of your own.
A.introduces
B.to introduce
C.introducing
D.introduced
网友回答
C解析考查非谓语动词。and连接并列成分，题干前面是it's worth considering, and后仍需是it's worth doing的结构，故选C。本题难度适中。