People who want to cross Canada in less than five days forget the fact _____ Canada is 5,500 kilometers from coast to coast.
| A．whether | B．that | C．how | D．why |
Since drug abusers have difficulty＿the addiction, support groups where they can talk about their struggles and find new ways to manage in the world are often needed.
| A．to rid | B．breaking | C．to remove | D．relieving |
China Hengda＿well have won the football match, but I don't know because I wasn't there.
| A．could | B．may | C．should ． | D．must |
Recently the Ministry of Environmental Protection issued a circular saying that China may adopt flexible working hours and stop school classes_____the highest air pollution warnings.
| A．for fear of | B．in terms of | C．on top of | D．in case of |
Although it doesn't look like＿，the entire cathedral is made of wood.
| A．it | B．that | C．this | D．such |
Turkey opened the world's first trans-continental underwater rail tunnel．＿Asia and Europe on 29 October, 2013,＿closer the day when it will be possible to travel from London to Beijing via Istanbul by train.
| A．connected; brought | B．connected; bringing |
| C．linking; brought | D．linking; bringing |