试题题干
WORD FORMATION
Complete the following sentence with the proper form of the word in the bracket.
(explain) Jack didn't give a very adequate
for being late.
参考答案
试题解析
此处缺少名词。
a是冠词，其后接名词。adequate是形容词，形容词修饰名词。所以空格处填explain的名词形式explanation。
句意：杰克对迟到没有给予充分的解释。