His father (die)____by the time the doctor arrived.详解,When he arrived at the hospital,he asked worriedly who was(operate)____on.These pills should(keep)____out of the reach of children.
问题描述：
His father (die)____by the time the doctor arrived.详解,
When he arrived at the hospital,he asked worriedly who was(operate)____on.
These pills should(keep)____out of the reach of children.
答
His father died by the time the doctor arrived.
When he arrived at the hospital,he asked worriedly who was operated on .
These pills should be kept out of the reach of children.
答
第一个：has died.意思是：当医生到的时候他父亲已经死啦。就是说医生倒是已经死啦！
operating。意思上：当她到医院的时候。他焦急的问谁在动手术。（谁在被手术）
be kept.意思是：被放在孩子够不到的地方。
答
had been dead
他父亲在医生到来的时候已经死了.
by the time 当/等到…的时候；完成时标志.