The company I work for is great: We __________over90%ofour trash insteadofthrowing it away.

‏Pictophonetic characters account for over ( ) of all Chinese characters. ‎ A: 60% B: 70% C: 80% D: 90%

Q:What is the present situation about Americans' communting to work? A: More and more Americans spend over an hour getting to work. B: Over 10 percent of Americans spend less than an hour getting to work. C: Only New York people spend more than 90 minutes getting to work. D: Over 10 percent of Americans spend more than 90 minutes getting to work.

According to a study finished in 2011, what percent of the groundwater in cities was polluted? A: Over 90 percent. B: 20 percent. C: 64 percent.

I have warned you not to do that __________. A: over and over B: over and over again C: again and over D: again and again over

求函数$y = {{1 + \root 3 \of {{x^2}} - \sqrt {2x} } \over {\sqrt x }}$的导数$y' = $( ) A: $ {1 \over 2}{x^{ - {3 \over 2}}} + {1 \over 6}{x^{ - {5 \over 6}}}$ B: $ - {1 \over 2}{x^{ - {3 \over 2}}} + {1 \over 6}{x^{ - {5 \over 6}}}$ C: ${1 \over 2}{x^{ - {3 \over 2}}} - {1 \over 6}{x^{ - {5 \over 6}}}$ D: ${1 \over 3}{x^{ - {3 \over 2}}} - {1 \over 6}{x^{ - {5 \over 6}}}$

A dog was _______by a bus and killed. A: turned over B: knocked over C: run over D: got over

Don't hand in your papers until class______. A: is over B: was over C: are over D: will be over

函数\(y = \sin {1 \over x}\)的导数为（ ）. A: \({1 \over { { x^2}}}\sin {1 \over x}\) B: \( - {1 \over { { x^2}}}\sin {1 \over x}\) C: \( - {1 \over { { x^2}}}\cos {1 \over x}\) D: \({1 \over { { x^2}}}\cos {1 \over x}\)

We are certain that he will _____ his illness. A: come over B: go over C: get over D: give over