while the police ______(visit) the office,he was talking on the phone.这个题目应该怎么填

The twins are ___(police). The police ___(be) cathing the thieves. While it was buying a sounvenir,I called the police是什么意思?while是什么意思? The thief___ ___ ___the police officers.小偷害怕警察 The police are investigating ___(爆炸的原因) 小偷害怕警察.The thief ___ ____of police.（翻译） whwn the police arrived the aline left the ground 为什么用when而不用while While it was looking at the souvenirs,the shop assistant called the police The police ___ ___ ___ the cases said that they were ___ ___the search for the murderer finally the police caught them at the traffic lights .同义句The police caught them at the traffic lights ___ ___ ___. 这个警察的头部受伤了 The police officer ___ ___ on the head They helped the police stop a fire last night 同义句They helped the police ___ ____a fire last night There's a hospital on the other side of the police station.改为同义句:The hospital is ___ ___ the police staion横线上填什么. 用括号里所给短语的适当形式填空（call the police ,in front of ,take off ,cuthair ,get out of)1、Bill was ___ while we were reading in the library.2、You can't ___ your seat during the flight,because it 's dangerous.3、If you need so The police found out the ___(存在)of poison in the dead woman's blood The victim's nose was ___(bleed) when the police arrived at the scene While the alien was buying a souvenir, the girl called the police中buy是延续性动词吗 while the police ______(visit) the office,he was talking on the phone.这个题目应该怎么填