雅思

答案:
21. B // hospital
22. C // the middle section
23. C // found it difficult to do
24. C // remove completely
25. B // rewrite
26. C // remove completely
27. Sight and Sound
28. Support Tutor
NOT Tutor
29. proof reading // proof read
30. 10 July
ALTERNATIVE FORMS ACCEPTED

（责任编辑：中大编辑）

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