CS giai thik
12. This is ______ the most difficult job I’ve ever had to do.
A. by chance B. by far C. by heart D. by myself
13. _____ the young still have to learn is the value of our tradition.
A. That B. This C. What D. It
14. Mother’s love for her children could never die _____ she’s alive.
A. as deep as B. as if C. as for D. as lon