第3题: [单项选择]According to the passage, sugar was used in the study to ______. A. feed the bees during the experiment B. make the bees live in groups C. reward the bees for good performance D. train the bees to travel to a particular place 参考答案:D 答案解析:此题文中第二段第二、三句有直接表述。
第17题: [单项选择]Susan Jones was at the bus stop well on time to take the 7:01 bus, but she had to miss her breakfast to do it(). A. catch up with B. catch C. run up to D. be catching 参考答案:B 答案解析:
动词辨析。A.catch up with赶上(尤指原本落后,努力追上);B.catch捕获,赶上(车船等),感染(疾病);c.run up to跑到,达到,积累到;因此答案为B。