问题补充:
He was walking along the sands he saw a big footprint in the sand.
A. while
B. as
C. when
D. after
答案:
A. while
B. as
(答案→)C. when
D. after
解析:考查固定句型。固定句型:be doing sth when…正在做某事在这时…(发生了意料之外的事情);句意:他正在沙地上走着,在这时他看见了一个大脚印。故C正确。
时间:2021-03-14 00:41:57
He was walking along the sands he saw a big footprint in the sand.
A. while
B. as
C. when
D. after
A. while
B. as
(答案→)C. when
D. after
解析:考查固定句型。固定句型:be doing sth when…正在做某事在这时…(发生了意料之外的事情);句意:他正在沙地上走着,在这时他看见了一个大脚印。故C正确。