run out 与run out of
问题描述：
run out 与run out of
They had to return from the hiking in the desert,for their food almost____
A.ran out of B.used up C.was given out D.ran out
“for”后面接的是什么句子?我觉得它不是个句子才用了ran out of
答
for后面是原因壮语从句,their food almost ran out（要吃光了）是原因.如果是ran out of后面要接名词,说明吃光了什么东西.