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26. She needs ________ how many books there are on the shelf. 
A. know    B. knowing    C. to know    D. are knowing
27. How many numbers between 10 and 100 are divisible by 5 ________.
A. 18    B. 19    C. 20    D. 21
28. Liz liked ________ the dolphin and the color of the cap.
A. either    B. neither    C. both    D. none
29. Some people play video games at home. ________ play them in the arcade.
A. Other    B. The other    C. Others    D. Another
30. She didn’t play volleyball last week and we ________.
A. did, too    B. aren’t, either    C. don’t, either    D. didn’t, either