题文
________hard you try, it is difficult to lose weight without cutting down the amount you eat.
| A.However |
| B.Whatever |
| C.Whichever |
| D.Whenever |
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________hard you try, it is difficult to lose weight without cutting down the amount you eat.
| A.However |
| B.Whatever |
| C.Whichever |
| D.Whenever |
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