问题
选择题
Setting fire to the public buildings ___ highly dangerous and forbidden by law.
A．are
B．is
C．has
D．were
答案
B
-ing形式短语作主语时，谓语动词常用单数。
搜题请搜索小程序“爱下问搜题”
Setting fire to the public buildings ___ highly dangerous and forbidden by law.
A．are
B．is
C．has
D．were
B
-ing形式短语作主语时，谓语动词常用单数。