1、We should allow students to design their school uniforms.Students __ __ __ to design their school uniforms.2、How long may I keep the book?How long ___ the book __ __?3、We should speak to old men politely.Old men __ __ __ __ politely.
问题描述：
1、We should allow students to design their school uniforms.
Students __ __ __ to design their school uniforms.
2、How long may I keep the book?
How long ___ the book __ __?
3、We should speak to old men politely.
Old men __ __ __ __ politely.
答
1.are allowed 2.can be kept 3.should be spoked to. 2分词可能拼写有误，你自己再查查书吧
答
Students _should be allowed_to design their school uniforms.
How long _may__ the book _be kept_ __?
Old men _should be spoken to _ __ __ __ politely.