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第一句:就是要你用A car開頭,但要維持原本的句意,所以應是a car is smaller than a bus
第二句:用many的比較級合併兩個句子,所以是Andrew ate more dumplings than Joy
第三句:將cheaper改成expensive,因為expensive的用法不是加er,所以應改成
1 The buns is less expensive than the breads
2 The breads is more expensive than the buns
第四句我不太確定