Laughter is good for you教案
an accident involving over ten vehicles has occurred in the east-bound lane.
if any of these symptoms occur while you are taking the medicine, consult your doctor immediately.
vi. + adv. or prep. to exist or be present in, among, etc:
violence of some sort seems to occur in every society.
minerals occur naturally in the earth's crust.
(3)occur to sb
the thought did occur to me.
[+ that] it never even occurred to us that he hadn't been invited.
does it never occur to you that i might like to be on my own occasionally?
自我檢測:
i __________ along the street looking for a place to park when the accident ______.
a went; was occurring b went; occurred
c was gong; occurred d was going; had occurred
答案: c