问题
选择题
Which of the following can NOT be used as subject?
A．Mary
B．walking along the street
C．they
D．feed the animals
答案
答案：D
一般作为主题时，要用名词，代词或相当于名词的词来修饰，而ABC都是相当于名词的词，或代词，故选答案为D，D为动词词组。
搜题请搜索小程序“爱下问搜题”