( ) What’s the surest sign that a product has become a pop-culture phenomenon? When it becomes generic, like Xerox, Cola, and Kleenex, BlackBerry has joined the club.
(A) It is a common phenomenon that a product has to join a club to be popular.
(B) It is a sign that a product must have a generic name to become successful.
(C) Like Xerox, Kleenex and Cola, BlackBerry is the latest product that has shown a sign of joining a cultural club.
(D) When a product is extremely successful, it also becomes a name to stand for all similar products on the market.
Step 1：瀏覽句意，找出主結構：“What’s the surest sign?” (什麼是最可靠的標誌)。
1. n. 符號、標誌、手勢、跡象
What does this sign mean?
The city government should put a traffic sign at this intersection.
Deaf-mute people have to communicate by signs.
There is scant sign of progress in Roy's studies.
2. v. 簽名、簽署、做手勢
Please sign your name at the bottom of this page.
Are you ready to sign the lease?
The teacher signed to her students to stop talking.