16.
A. except
B. except for
C. apart from
D. but
17.
A. replenished
B. replaced
C. replicated
D. reposed
18.
A. electronic
B. electric
C. electricity
D. electron
19.
A. program
B. programmable
C. programmed
D. programming
20.
A. resurrect
B. reproduce
C. resuscitate
D. resume