Mr. Li devoted all his life English. Now he retired.A. to teachB. to teachingC. to be taug

问题补充：

Mr. Li devoted all his life English. Now he retired.

A. to teach

B. to teaching

C. to be taught

D. to have being taught

答案：

A. to teach

(答案→)B. to teaching

C. to be taught

D. to have being taught

解析：本题考查动词devote的用法。devote …to 致力于，献身于，短语中的to是介词。本题句意：李先生一生都致力于教英语上，现在他退休了。