16. What……………..awful man !
A. a B. an C. the D. X
17. The Nile Rivers is the ……………………river in the world, ………………..the Amazon is the widest.
A. long/ so B. long / because C. longer/ but D. longest/ but
18. American students take part ……………….different activities at recess.
A. at B. on C. to D. in