13.A. both B. either C. neither D. not
12.A. way B. word C. foot D. hand
11.A. anything new B. something new
C. new anything D. new something
10.A. how to learn B. why to learn
C. how does he learn D. why does he learn
9. A. learn B. to learn C. learning D. learned
8. A. many B. much C. more D. most
7. A. best B. only C. just D. first
6. A. at B. in C. on D. with
5. A. stop B. ask C. ready D. prepare
4. A. how B. where C. why D. what