问题
选择题
After a short holiday, he _____ himself once more to his studies.
A．applied
B．converted
C．engaged
D．exerted
答案
答案：A
apply oneself to“致力于”。Apply one's mind to(专心于)。Apply to sb. for aid(向某人求援)。Apply a theory to practice(把理论应用于实践)。