1 . 是
wereit not for 若不是有were是weren't 不是
2 . 被
The police werebaffled , and Sherlock Holm was called in to investigate ., 警方被難住了 , 于是請福爾摩斯前來偵查.
3 . 都
The principal conquests of the Romans wereachieved under the republic ;, 羅馬主要的征服都是在共和體制之下完成;
4 . 正
Now we weredriving to Sevilla , I took some pictures in the car ., 現在我們正駕車前往塞爾維亞 , 在車上我拍了一些像片.