Question

Before going abroad he devoted all he could ____ his oral English.

Before going abroad he devoted all he could ____ his oral English.
A. practise B. to practise C. practising D. practised

Answer 1

此题答案选D。
需要注意两点：一是 devote … to … 是固定搭配，意为“把……贡献给……”；二是其中的 to 是介词，不是不定式符号，后接动词时要用动名词。