练习一Directions: Read the following three passages. Each passage is followed by veral questions or unfinished statements. For each of them there are four choices marked A, B, C and D. Choo the one t
练习一Directions: Read the following three passages. Each passage is followed by veral questions or unfinished statements. For each of them there are four choices marked A, B, C and D. Choo the one t