单项选择题
A.A mystery story. B.The hiring of a shop assistant. C.The search for a reliable witness. D.An unsolved case of robbery.
A.Three groups of learners. B.The importance of business English. C.English for Specific Purposes. D.Features of English for different purposes.
A.Because it was too heavy. B.Because it did not bend easily. C.Because it did not shoot far. D.Because its string was short.