【单选题】December is _______ month of the year.
【单选题】Hmm, well let me think. 表达犹豫意思要用什么语调?
【简答题】There are ________months in a year. December is the ________month of the year.A. twelve; twelve B. twelve; twelfth C. twelfth; twelve D. twelve; twelveth
【简答题】从地质方面、地形地貌方面识别活断层的标志有哪些?