itwasatfiveo’clockintheafternoon()theyhadtheirsupper为什么不能用that,他们说删去itwas后句子不完整,哪里不完整了

Question

it was at five o’clock in the afternoon ( ) they had their supper 为什么不能用that,他们说删去it was后句子不完整,哪里不完整了

Answer 1

回答：此处应该用that,原句应该是：They had their supper at five o’clock in the afternoon.
强调句型it was ...that 强调了“at five o’clock in the afternoon” .
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