【单选题】- How was your trip to London, Jane? - ___________
C.
The guide showed me the way.
【单选题】I ______ to London last year. [ ]
【简答题】紫草科植物常被______,叶______生,花______性,整齐,花冠______瓣,喉部常有______;心皮______,______室。
【简答题】轻重金属的判别:重金属一般指比重大于()的金属。
【简答题】常见的型线形状有( )、( )、( )、( )等等。
【单选题】I_____ London. I went there last month.