loadingA：such an interesting B：such interesting a C：so an interesting D：a so interesting 正确答案：A
15：It wasn‘t anaccident. He did it on ______. A：reason B：determination C：purpose D：intention 正确答案：C
16：Everything seems all right， ___________? A：doesn't it B：won't it C：hasn't it D：don't they 正确答案：A
17：In some parks visitors are requestedto keep___ the grass. A：aside B：away C：out D：off
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正确答案：D
18：
19：— Why was Fred so upset?— He isn’t used _________ criticized. A：be B：to be C：to being D：having been 正确答案：C
20：You aren’tusing this typewriter， ___________? A：are you B：do you C：will you D：have you 正确答案：A
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