【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
Electric eels are potentially dangerous.
B.
Biology and electricity appear to be closely related.
C.
People would be at a loss without electricity.
D.
Scientists still have much to discover about electricity.