【評論主題】If a typist wishes to type rapidly, he _______ develop a rhythmic movement of his fingers.(A)used to

【評論內容】

If 之後接假設的形式 通常會用must來接期望的結果

【評論主題】If a typist wishes to type rapidly, he _______ develop a rhythmic movement of his fingers.(A)used to

【評論內容】

If 之後接假設的形式 通常會用must來接期望的結果