Before going abroad he devoted all he could _______ his oral English.
#97453
A
improve
B
to improve
C
improving
D
to improving
推荐题目
Our school forbids_____ ,that is to say, we are not allowed ____ at school.
#96871
A
to smoke, to smoke
B
students’ smoking, smoking
C
students’ to smoke, smoking
D
students’ smoking, to smoke
Tom’s brother who is now a doctor always encourages        hard and go to college. 
#94511
A
for him studying
B
him studying
C
for him to study
D
him to study