The written form of English is a(an)（ ）representation of the spoken form.
A、selective
B、adequate
C、imperfect
D、natural
【正确答案】：C
【题目解析】：The written form of English is an imperfect representation of the spoken form.英语的书面形式并不完全代表口语形式。A选项“选择性的”，B选项“充足的”，D选项“自然的”均不符合题干要求，故答案为C，imperfect（有缺点的）。
