His children were at home last 句子的主语是什么?

His children were at home last 句子的主语是什么? The children were playing at soldiers. he had to work hard to earn money () his children were at college 为什么要填as 而不是before The smiling faces of his children the father at last A was pleased withB were pleased with C pleased Dto please The children were playing at soldier什么意思 His dog is(looks looking look)at the children We were surprised at the news of his _______(die) We were surprised at the news of his ( ) (die) One day,a boy and his little sister were sitting by a lake near their house when a bear appeared.There was 51 place for them to get away.The children had to step back to the 52 .They kept backing and the bear kept 53 at them.As the two children were the children __dinner when some of his friends came to see them.were being served were served At eight o’clock this morning,the children were going to school.Pat was c______ by bus,because it was cheap.John was walking because his home was near the school.Ann and Peter were waiting for the taxi because they were late and taxi was fast.Mr Le he felt as if his whole world had when his children were killed in the airplane accident. the children were all at home同义句：____the children____at home in the morning,t__was a party at s____.there were talking to the children about h_____ The children were ()at the ()story用bore的适当形式填空并且说明理由 the children were all____(frighten）and looked at each other in fear 期末考~急what ()the children wearing at the moment.是填were还是are the children were singing----the momentA in B TO C the D at