问题
选择题
While Ann ___ TV, her father came home.
A．is watching
B．was watching
C．watch
D．watches
答案
答案：B
while引导的时间状态从句常用进行时态
搜题请搜索小程序“爱下问搜题”
While Ann ___ TV, her father came home.
A．is watching
B．was watching
C．watch
D．watches
答案：B
while引导的时间状态从句常用进行时态