问题补充:
The boy burst into tears he saw his mother.
A. at the moment
B. in a moment
C. for a moment
D. the moment
答案:
A. at the moment
B. in a moment
C. for a moment
(答案→)D. the moment
解析:考查连词短语。句意:这个男孩一看见妈妈就突然哭起来了。句中the moment为连词短语,表示“一……就……”,其它短语只可作状语,A.at the moment此刻,B.in a moment一会儿,C.for a moment有一会,都不能做连词,故选D。