He was a good student and scored ________ average in most subjects.[ ]

____ to nuclear radiation, even for a shorttime, may produce variants of genes in human body.

Could I a dictionary from you. David-Sorry , I it to my cousin yesterday.

25 Thirty years ago this month，China’s leaders launched aneconomic revolution___________the door to free market reforms and foreigntrade

.The man rewarded with a large amount of money was too ___ to tell his family.