adj. existing in large numbers
A. obvious
B. occasional
C. numerous
D. optional
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adj. connected with the education of children from 2 to 5 years old; n.a room in a house where young children can play
A. ornament
B. outlook
C. nursery
D. nitrogen
v.to not include sth./sb., either deliberately or because you have forgotten it/them
A. omit
B. ignore
C. modify
D. persist
v. to make sb. feel upset because of sth. you say or do that is rude or embarrassing
A. oblige
B. oppress
C. offend
D. occupy
n. a child whose parents are dead
A. musician
B. overcoat
C. outset
D. orphan