The work of writing Christmas cards kept Philip ______ for a whole week.

单项选择题She was ______ because she felt that she had been punished unfairly.

单项选择题The performance of this reasonably priced record player is ______ in quality to that of some more expensive hi-fi sets.

单项选择题We should adapt to the ______ of the society we live in.

单项选择题In the first round of the FA cup most of the amateur teams were ______ from the competition.

单项选择题One of California' s greatest problems is providing ______ water to meet the needs of its expanding population.

单项选择题The war has raised questions about the utility of the national guard and reserve organizations, which the Department of Defense finds ______ to U.S. defense needs but which the Congress desires to maintain.

单项选择题The ______ homogeneous Dakota grasslands are actually a botanical garden (植物园) of more than 400 types of grasses.

单项选择题It is ______ whether Sam will come to attend his best friend's funeral as he has taken the town's money and made off with it.

单项选择题It is well known that knowledge is the ______ condition for expansion of mind.

单项选择题Travelers in space have to ______ many discomforts in their spaceships.