问题
选择题
| — What _____ they doing? — They _____ studying. |
A. are, are B. is, is C. was, are D. are, do |
答案
答案：A
搜题请搜索小程序“爱下问搜题”
| — What _____ they doing? — They _____ studying. |
A. are, are B. is, is C. was, are D. are, do |
答案：A