现在完成时、过去完成时、现在完成进行时题目hi,Joan,I haven't seen you for ages,What_____recently?Carrying out some research on wildlife.1 did you do2 have you done 3 were you doing 4 have you been doing
问题描述：
现在完成时、过去完成时、现在完成进行时题目
hi,Joan,I haven't seen you for ages,What_____recently?
Carrying out some research on wildlife.
1 did you do
2 have you done
3 were you doing
4 have you been doing
答
选第四个,现在完成进行时,
问最近在做什么,第一个选项一般过去时,第二个现在完成时,第三个过去进行时.