[单项选择]It was not until dawn_________ their way out of the forest.
A. when they found
B. that they found
C. did they find
D. that they didn’t find

[单项选择]It was not until dawn_________ their way out of the forest.
A. when they found
B. that they found
C. did they find
D. that they didn’t find

[单项选择]It was not until dawn （） their way out of the forest.
A. when they found
B. that they found
C. did they find
D. that they didn’t find

[单项选择]It was not until dawn _____ their way out of the forest.
A. when they found
B. that they found
C. did they find
D. that they didn’t find

[单项选择]As was discussed before．it was not until the 19th century that the newspaper became the dominant pre-electronic medium．
A. 正如以前谈过，直到19世纪报纸才成为电子时代以前的主导媒体。
B. 正如以前谈过，直到19世纪报纸还没成为电子时代以前的主导媒体。
C. 正如以前谈过，19世纪后报纸才成为电子时代以前的主导媒体。
D. 正如以前谈过，直到19世纪报纸才占领电子时代以前的媒体。

[单项选择]Until the 16th century the earth ______to be flat.
A. is believed
B. has been believed
C. believed
D. was believed

[填空题]Private claims advocates help people figure out their bills free of charge.

[填空题]Not until the 18th(上标) century ______ (人类才意识到) that the brain controlled our thinking.

[单项选择]Every other week it seems a new study comes out that adds to our already- formidable store of parental worries. But even by those escalating standards, the report issued last week by the federal government’s National Center for Health Statistics contained a jaw-dropper: the parents of nearly one of every five boys in the United States were concerned enough about what they saw as their sons’ emotional or behavioral problems that they consulted a doctor or a health-care professional. By comparison, about one out of 10 parents of girls reported these kinds of problems.
The report confirms what many of us have been observing for some time now: that lots of school-age boys are struggling. And, parents are intensely worried about them.
What is bothering our sons Some experts suggest we are witnessing an epidemic of Attention-deficit hyperactivity disorder (ADHD) and say boys need more medication. Others say that environmental pollutants found in plastics, among other things, may be
A. About 20% of boys had emotional or behavioral problems.
B. About 20% of boys consulted a doctor or a health-care professional.
C. Parents of about 20% of boys had emotional or behavioral problems.
D. Parents of about 20% of boys consulted a doctor or a health-care professional.

[简答题]

You probably won’t be shocked to find out that the inventor of tire rubber is Charles Goodyear, as he’s the only guy on the list to actually get his name attached to the end product. (46) It wasn’t easy coming up with a form of rubber tough enough to withstand the drag racing and car chases everyone envisioned the day the automobile was invented. In fact, if there was one man who should have given up his life dream, it was Goodyear. (47)The man spent time in and out of prison, lost every friend he had and starved his children in his tireless pursuit of a stronger form of rubber.
(48) After his first two years of tinkering and failing with primitive rubber in the 1830s, Goodyear and his family were camping out in an abandoned factory and fishing for sustenance. This is when he made a huge breakthrough: He’d use acid to smooth out and toughen rubber! The government bought 150 mailbags made of the stuff and the rest is...