I borrowed several books from the library, ________ are about English study.
Nuclear radiation is said __________ the biggest health challenge in Japanese Earthquake over the past few months.
They must have been enjoying themselves there,or they __________ so long.
—Did you enjoy your journey to the village?— __________.We had driven more than 3 hours before we found the right way.
He telephoned to inform me of your birthday.____________,I would have known nothing about it.
Actually,the London Olympic Park is built _____________ there used to be a poor area called East London.