In the meantime, the question facing business is whether such research is the cost.
| A．worth | B．worth of | C．worthy | D．worthwhile |
There are some health problems that, when ___in time, can become bagger ones later on.
| A．not treated | B．not being treated |
| C．not to be treated | D．not having been treated |
If what your friend comes up with surprise you, don’t reject it immediately. _____, imagine that it is true.
| A．Thus | B．Besides | C．Rather | D．Otherwise |
Bears _____ fat stores throughout the summer and fall to have energy enough to last them through their winter sleep.
| A．pack up | B．build up | C．bring up | D．take up |
The only way to succeed at the highest level is to have total belief _____ you are better than anyone else on the sports field.
| A．how | B．that | C．which | D．whether |
People develop ______ preference for a particular style of learning at ______ early age and these preferences affect learning.
| A．a; an | B．a;不填 | C．不填;the | D．the ;an |