The question that puzzled them is ____ they can get rid of the air pollution in the area.
| A．how is it that | B．that how | C．what is it | D．how it is that |
Philosophical problems arise when people ask questions that, though very , have certain characteristics in common.
| A．diverse | B．relevant | C．abstract | D．consistent |
The College Entrance Examination is around the corner, but we should strike a
between study and relaxation.
| A．association | B．balance | C．compromise | D．obstacle |
In modern society people have to pass various test for professional so that they can be qualified for a good job.
| A．standards | B．perseverance | C．certificates | D．permission |
Billy kept asking his mother whether he could go to the movies and she at last.
| A．gave way | B．gave up | C．gave out | D．gave away |
Robert has rich work experience, so it will for his lack of academic knowledge.
| A．pick up | B．take up | C．bring up | D．make up |