答案
5. adj. 时常发生的 adv. 频繁地,经常地 6. n. 票价,车费 n. 费用,学费 Ⅱ.短语检测 1. 最后 2. 一方面……另一方面…… 3. 和,也
frequent
frequently
fare
fee
in conclusion
on the one hand...on the other hand...
as well as