Above-ground swimming pools have ________ the flexibility of being able to be moved from place to place but also the efficiency of using less water than standard in-ground pools.
A. that
B. all
C. in addition
D. not only
Answer:D
Above-ground swimming pools have ________ the flexibility of being able to be moved from place to place but also the efficiency of using less water than standard in-ground pools.
A. that B. all C. in addition D. not only