作业帮how old -----w------this twins last year
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how old -----w------this twins last year
how old -----w------this twins last year
how old -----w------this twins last year
were
恩是were
last year 过去时，这里应该用were,are的过去式 were
was 我觉得它的考点不是单纯考你过去式，这里的"this twins"应该是一个可能叫做集合名词吧，我也忘记了，我觉得应该用单数形式，错了不管昂。。呵呵o(∩_∩)o...
were
were