Recent changes in climate may ______ that global warming is starting to have an effect.

单项选择题A ______ racial incident in the summer of 2003 was cause for great public and administrative concern.

单项选择题Many hunting and gathering people of the late 10th century have recently adopted some form of organized agriculture to ______ their wild food resources.

单项选择题Paul is amazingly ______ in trying to get Mary to go out with him.

单项选择题A resolution to maintain the ceasefire was carried by an ______ majority.

单项选择题Intention movements are activities that tend to ______ some other activities, which is presumably why they often evolve into signals.

单项选择题The balances on their operating statements can not be called profits or losses, rather they are called surpluses or ______.

单项选择题Some companies are limiting the risk by conducting online ______ only with established business partners who are given access to the company's private intranet.

单项选择题It is important that employees stick to their company's security policies because ______.

单项选择题The word underscore in the last sentence of the text probably means ______ .

单项选择题The 2003 survey reveals that ______.