单项选择题

It seems that smaller ants perform more of the _______.

A．construction tasks
B．domestic tasks
C．defensive work
D．heavy work
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单项选择题
The underlined word good (Para. 3) refers to ants'_______ .
A．co-operation in working
B．sense of responsibility
C．efficiency in working
D．willingness to work hard
单项选择题
The primary purpose of desk rearrangement is ______.
A．for the teacher to divide students into small groups
B．to make it possible for students to interact with each other
C．for the teacher to find out how students think
D．to give students more opportunities to practice speaking
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