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12. keep up with　跟上

11. keep up　　保持，不使低落

10. keep up　保持，堅持

9. keep up　繼續

8. keep silent　保持沉默

7. keep ... out　擋住，留在外面

6. keep out　不得入內

5. depend on　依靠，依賴 keep his words　遵守諾言

4. keep on　　繼續不停地做某事

3. keep in touch ... with　與...保持聯系