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A. had been on has begun has been on had begun
had gone out had been put out had put out had been out
had been started had been on for half an hour was to start had begun for half an hour
began had began had been on has been on
has been dead，arrived at has died，got to had died，arrive in had been dead，reached
had been waiting have been waiting have waited was waiting
has started had been on has been on had started
would drive had driven has been driving drove
has interrupted had interrupted was interrupted had been interrupted
has begun has been on had begun had been on
were lain had been lain have been lying had been lying
has been on has began has begun had begun
had died had been dead died has been dead
had been on has begun have been on had started
has left left has been away had been away
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