填空题 Choose the correct letter, A, B or C.

单选题 What does Jim think about the difference among species in natural and artificial light?

A、 It makes no difference.
B、 Species will die out in natural light.
C、 Species will die out in artificial light.

【正确答案】 A

【答案解析】解析：定位到“I'm not sure it makes much difference which one you use；species will die outeither way．”其中“die out”意为“灭绝，消失”，故本题选A。

单选题 One reason why Jim and Jane felt unsatisfied about the theories discussed in the lecture was that

A、 governments didn't increase any spending on them.
B、 most theories had nothing to do with the exams.
C、 many theories lacked solid proof in the field.

【正确答案】 C

【答案解析】解析：本题出题句为“The theories discussed in our lectures，like Simpson’s and Grey’s，are sovague and lack proof,so I don’t understand why we even study them．”其中“vague”意为“模糊的，含糊的”，“lack proof”意为“缺乏证据”，故本题选C：本领域的许多理论缺乏充足的证据。