109. Most cells in multicelled organisms perform ________ functions.
A. specialize
B. specialized
C. they specialize
D. specialization
110. The big island of Hawaii, in the middle of the Pacific Ocean, ________ by five volcanoes.
A. creation
B. it was created
C. creating
D. was created
111. The Sun uses up over four million tons of hydrogen per second, ________ still has enough hydrogen to last for the next five billion years.
A. it does not
B. it
C. but it
D. to it
112. For Katherine L. Bates, who ________ the top of Pikes Peak in 1893, the view provided the inspiration for her hymn “America the Beautiful.”
A. reached
B. she reached
C. reaching
D. she was reaching
