21. When I returned home, I found the window open and a number of things   __C______.

A) to steal

B) stealing

C) stolen

D) missed

22. I thought it was worthwhile _____B___ a hundred miles to see the   basketball game.

A) of driving

B) driving

C) drive

D) being driven

23. Is there anything you want from town? I am going to get ___A_____.

A) these letters mailed

B) mailed letters

C) to mail those letters

D) those letters mail

24. The only thing _____A___ really matters to the children is how soon they   can return home.

A) that

B) which

C) what

D) /

25. The telephone was invented in 1876 by a man __A______ Alexander Graham   Bell.

A) named

B) naming

C) that names

D) who named