下面是一些比较典型的“雷人型”题目，请大家做做看：
1. Mr. Wang made up his mind to devote all he could ____ his oral English before going abroad.
A. improve B. to improve C. improving D. to improving
2. Everything he ____ away from him before he returned to his hometown.
A. took B. had been taken C. had had been taken D. had taken
3. Before he went abroad, he spent as much time as he ____ English.
A. could learning B. learned C. to learn D. could learn
