What were you doing when the bell r_____?Please c______the windows.It's too cold.

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What were you doing when the bell r_____?Please c______the windows.It's too cold.
What were you doing when the bell r_____?
Please c______the windows.It's too cold.

What were you doing when the bell r_____?Please c______the windows.It's too cold.
1.rang (主句过去进行时,when从句用过去时,表示"在铃声响起的时候,你在干什么?")
2.close(祈使句,所以用动词的原型)

当铃声响起来的时候你在做什么?
用 ring 的过去式:rang

1、当铃声响起来的时候你在做什么?
用 ring 的过去式:rang
2、这太冷了,请关上窗户。
关上的动词为closed.且为祈始句。所以填closed.

rang.
ring的过去式为rang
close
意为关掉