A.His classmates know the woman's mum. B.His classmates sends him the letters. C.He already promised to introduce his classmates to the woman's mum. D.He already promised to save the stamps for his classmates.
【单选题】]______chart 3994, positions read from this chart should be shifted 0.03 minutes Northward. A)To consider B. To check C. To examine D. To agree with