________ the police thought he was the most likely one，since they had no exact proof about it，they could not arrest him.

The medicine works more effectively ________ you drink some hot water after taking it.

You will be successful in the interview ________ you have confidence.

People who are really in need of houses will suffer heavy losses ________ the government takes measures to bring down house prices.

________ hard one may work, one cannot master a foreign language in a month or two.

________ he has limited technical knowledge, the old worker has a lot of experience.

(2013·辽宁五校联合体第一次考试)What impresses me most is ________ he appears in front of others, he wears a sincere and charming smile.

(2013·河南开封一模)It is announced that big prizes will go to ________ finishes the assignment on time.

(2013·四川省乐山一模)The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them.

(2013·成都第一次诊断)Actually, the London Olympic Park is built ________ there used to be a poor area called East London.