Why the explosion occurred was ____ the laboratory attendant had been careless.
(2014届陕西省西工大附中高三第六次模拟英语试卷) My daughter bought me six novels in English from England, most of were the best-sellers of 2013.
She showed the visitors around the museum, the construction _____had taken more than three years.
The old town has narrow streets and small houses _____are built close to each other.
You’ll find taxis waiting at the bus station ____ you can hire to reach your host family.
English is a language shared by several diverse cultures, each of ____ uses it somewhat differently.