问题补充:
The problem many children have out of school is getting more and more serious.
A. that;dropped
B. which;got
C. of;fallen
D. as;run
答案:
(答案→)A. that;dropped
B. which;got
C. of;fallen
D. as;run
解析:problem后是一个同位语从句,因此用that引导,drop out of school是“辍学”之意。