问题
选择题
Both Class 3 and our class won't be able to finish the work unless they ___ each other.
A．team up with
B．come up with
C．put up with
D．catch up with
答案
答案：A
短语辨析。A合作；B想出；C忍受；D赶上；结合句意可知A正确。句意：3班和我们班级都不能完成这份工作，除非两个班级相互合作。