(1)This time yesterday Jack_____(mend) his bike.(2)I____(write) a letter at ten last night.

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(1)This time yesterday Jack_____(mend) his bike.(2)I____(write) a letter at ten last night.

mended
was writing

was mending. 过去进行时的用法表过去某个时刻正在进行的动作
2。was writing