A-A+
(Electronic) mail to describe an upcoming work
问题详情
(Electronic) mail to describe an upcoming workshop (should use) only (if) potential participants use this form. of communication (regularly).
A．Electronic
B．should use
C．if
D．regularly
参考答案
正确答案：B
解析：electronic mail和use是被动的关系，故应将should use改为should be used。
