[单项选择]The most popular newspaper in Ireland is
A. The Irish Times.
B. The Irish Press.
C. The Irish Independent.
D. The Irish Daily.

[单项选择]As automation became popular in most factories, labor was made______.
A. destined
B. redundant
C. diverse
D. discontent

[单项选择]Running is the most popular form of exercise because it requires little training or equipment．
A. 跑步是最受喜爱的运动方式，因为它需要很少的训练和设备。
B. 跑步是最受欢迎的运动方式，它只需要一点点的训练和少量的器材。
C. 跑步是最大众化的运动方式，它不需要什么训练或器材。
D. 因为跑步只需要少量的训练和没备，所以它是最流行的运动方式。

[单项选择]The turkey is a most popular food on Thanksgiving Day.

[单项选择]PCs are the most popular games machine for Millennium games.

[单项选择]Beer is the most popular drink among male drinkers ______ overall consumption is significantly higher than that of women.
A. that
B. what
C. which
D. whose

[单项选择]Next to football, the most popular sport in Britain should be ______.
A. basketball
B. ping-pong
C. cricket
D. golf

[单项选择]

The most popular organic gem is the pearl. A pearl is the response of a marine mollusk to the presence of an irritating impurity accidentally introduced into its body; a cultured pearl is the result of the intentional insertion of a mother-of-pearl bead into a live mollusk. Whether introduced accidentally or intentionally, the pearl-making process is the same: the mollusk coats the irritant with a substance called nacre. Nacre is composed chiefly of calcium carbonate. Because very few natural pearls are now on the market, most pearls used in fine jewelry are cultured. These include "Biwa" pearls and most other freshwater pearls. Cultured pearls are not easily distinguished from natural pearls except by an expert.

What is the chief component of nacre（）
A. Sand.
B. Bead.
C. Calcium carbonate.
D. Biwa.