单项选择题A．Once.B．Twice.C．Three times.D．Never.

单项选择题A．Take a break.B．Go to work.C．Do the other problems.D．Keep trying.

单项选择题A．Paris.B．Copenhagen.C．New York.D．London.

单项选择题A．She feels nervous about the test.B．She worries about her competence.C．She thinks she is well prepared.D．She doesn’t like the training behind the wheel.

单项选择题A．Buy something to eat on the train.B．Take the five o’ clock trainC．Wait to catch a later train.D．Take the train to the airport,

单项选择题A．The man is handsome.B．The man used to be unhealthy.C．The lecture is not very clearD．The man has become a better person.

单项选择题A．Same gene, same life.B．Identical twins also have very different lives.C．The element of environment is more important.D．None of the above.

单项选择题A．In a bar.B．In a restaurant.C．In a hotel.D．In a grocer’s.

单项选择题A．Cathy is not so brilliant.B．Cathy thinks her mother is very kind.C．She went to France with the school choir last year.D．The man is her father.

单项选择题A．Teotihuacan, once the home of 200,000 people, was the center of a large empire.B．Many archaeologists are fascinated by the ruins of a pre-Columbia city called Teotihuacan.C．Teotihuacan, once a major metropolitan area, was destroyed by an invasion.D．A still unsolved mystery is why the people of Teotihnacan suddenly abandoned their city.