_____(直到傍晚的时候)that he began to tackle the major problem.

【正确答案】It was not until late afternoon

【答案解析】①It is．．．that是强调句型，被强调部分放在It is与that之间；②not．．．until表示“直到……才”；③“傍晚的时候”可译为lateafternoon。