单项选择题
What form of ice is of land origin?（）
A.Shuga B.Floe C.Spicule D.Bergy bit
单项选择题 What does the term TO NAVIGATE WITH CAUTION mean?（）.
单项选择题 What are symptom(s) of a ruptured appendix?（）
单项选择题 We have no steel wire．You had better（）us one.
