[单项选择]About the sixth century A. D. when few Europeans could read, the Chinese ______ paper.
A. invented
B. had invented
C. have invented
D. had been invented

[单项选择]By the sixth century AD, when few Europeans could read, the Chinese ______ paper.
A. invented
B. had invented
C. have invented
D. had been invented

[单项选择]In the sixth paragraph, when talking about empowerment, the writer means that ______.

[单项选择]What is the problem when few realize the link between the ability to talk fast and easily understandable pronunciation and meaning
A. They can actively learn vocabulary items or good syntax.
B. The students have many cognitive problems themselves.
C. It is difficult to talk fast and easily understandably.
D. The need for speed is not clear at the very beginning.

[单项选择]

In the nineteenth century, poor Europeans seeking to make their fortunes turned to America as a matter of course .（）

A. automatically
B. obviously
C. traditionally
D. resignedly

[单项选择]I'll tell you all about it when you ______ back.

[单项选择]When Adams served as the sixth U. S. President, ______.

[单项选择]

American are careful about how and when they meet one another’s eyes. In their normal conversation, each eye (61) lasts only about a second before one or both individuals (62) . When two Americans look (63) into each other’s eyes, emotions are heightened and the relationship becomes more (64) . (65) , they carefully avoid this, except in appropriate circumstances.
Proper street behavior in the United States (66) a nice balance of attention and (67) . You are supposed to look at a passer-by just enough to show that you (68) his presence. If you look too (69) , you appear arrogant or secretive; too much and you’re (70) . Usually what happens is that people eye each other (71) they are about eight feet apart, at which point both cast down their eyes. In England the polite listener stares at the speaker (72) and blinks his eyes occasionally as a sign of interest. That (73)
A. glanced at
B. glared at
C. peeped at
D. stared at