A: Because they have different physical construction.
B: Because they are more offensive than male lightning bugs.
C: Because they want to frighten their enemies.
D: Because they try to attract males to them.
举一反三
- Lightning bugs can blink themselves because of a chemical substance Lightning bugs can blink themselves because of a chemical substance A．in the head. B．in the tail. C．in the abdomen, D．in the wing. A: in the head. B: in the tail. C: in the abdomen, D: in the wing.
- Lightning bugs can blink themselves because of a chemical substance According to the passage, which of the following about lightning bugs is INCORRECT A: They use blinking signals to communicate. B: They use blinking signals to seek for food. C: They use blinking signals to attract their own species. D: They use blinking signals to frighten and warn enemies.
- _________needs to be renewed because the bugs need to be debugged.
- Why do Chinese people eat fish on New Year's Eve? A: Because they want to live longer. B: Because they want to have more gold in the coming year. C: Because they want to have more luck in the new year. D: Because they want to have more than they need in the new year.
- _________needs to be renewed because the bugs need to be debugged. A: Software B: Hardware C: IP address D: Virus
内容
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Why does the younger generation in China work hard? A: Because they want to have more money. B: Because they want to accumulate more experience. C: Because they don’t want to exercise in parks. D: Because they want to be like westerners.
- 1
Computers have been getting more popular（） A: because the Americans want to appear rich B: because they are smaller, cheaper and easier to use C: because they can help Americans do everything D: because 'they can type letters
- 2
Why will the population in poorer countries increase（） A: Because they need more labor to support the family. B: Because the people have the habit to have a big family. C: Because the people there are poorer. D: Because the people there want to be rich.
- 3
Why do people in developed countries travel more A: Because they like adventures more. B: Because they enjoy the fresh air more. C: Because they have more holidays. D: Because they are richer.
- 4
Why do employers use headhunters?( ) A: Because headhunters can find more proper talents than those the company finds on its own. B: Because their compensation is based on their results, not their level of activity. C: All of the above. D: Because they focus on fewer assignments and have more time to approach passive candidates.