The purpose of the shock produced by electric fish is to______.
A．protect themselves from being attacked
B．light up nearby waters
C．attack other fish or marine animals
D．both A and C
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Kerry: Hi, Joanne. How's it going？ Joanne: Terrible. I just found out I have a chemistry test tomorrow. Kerry: Your professor didn't tell you until now？ Joanne: He told us--I just didn't hear it. Kerry: What're you going to do？ __ Joanne: I'll have to, because I also have an exam in French tomorrow.
A．Don't be nervous.
B．Pull an all-nighter？
C．Want to go bowling tonight？
D．You look really out of it. -
The most powerful electric fish produces enough electricity to______.
A．light a large electric motor
B．kill a marine animal
C．drive a small electric motor
D．kill a large fish -
Electric rays are likely to be______.
A．near the North Pole
B．in warm waters
C．near the South Pole
D．both A and B -
Who does the author say tend to identify themselves with the characters in games？
[A] Teenage girls.
[B] Older women.
[C] Men in their 20s.
[D] Men 50 and older. -
听第10段材料，回答第17 -20题。
What is the purpose of the meeting？[A]To determine who will graduate this year. [B] To discuss the seating arrangement. [ C] To begin planning the graduation ceremony.