What __(do)they do on Sundays. 横线上应该填do的什么的形式?求解答 还有建议的讲解,要易懂 !本人分不清三单的使用火候,能不能在有复数的情况下使用.

What __ they __ they __(do) there? what do they do? what do they do they what do they do?(工程师) what do they What do they what do they What do they need? what animals do they they/have/what/do/(?) what do they What do you do __ christmas?快 They shall do what they 选择:What __ at nine o'clock last Sunday morning?A was you doing B were you doing C are they doingD does we do I don't believe they'll arrive before five o'clock__ __?A do you B do I C do they D will they what do they do at the party what do they want to do? Do you what they should do?