Question

几道英语题求解析，急急急急！！！！

1. when i _____through the station,i saw the accident ________. A. pass;happing B.passed;happened C.past;to happen D.passed;happen 2. when i ______maths problem,i _____my note-book was left in the classroom. A.began doing;found B.started doing;found out C.started to do;looked for D.began to do;looked up 3. the old man sold all his collections _____the children in hospital. A. to help B.help C.helped D. helps

Answer 1

1.
D
(pass是动词，
past常作介词/副词；
see
sb./sth.
do看到……做……表示整个过程）
2.
A
（start/begin
to
do/doing...开始做……；
find发觉；find
out找出；查明)
3.
A
（动词不定式表示目的）