It is said that potato chips ____________ by mistake about a hundred years ago.
#41556
A
invent
B
invented
C
are invented
D
were invented
推荐题目
—I have seen the film Titanic already．一When_______ you________ it?
#40380
A
have；seen
B
will；seem
C
did；see
D
did；seen
---Let’s go fishing if it ______ this weekend.---But nobody knows if it _______.
#39630
A
is fine; will rain
B
will be fine; rains
C
will be fine; will rain
D
is fine; rains
Peter has many brothers, but he _________ have any sisters.
#41604
A
is not
B
can not
C
did not
D
does not
—What happened? I called you several times yesterday evening, but I couldn't get through.—Sorry, my sister and I ________ on the phone all the time.
#63705
A
talked
B
have talked
C
were talking
D
have been talking
We learned in geography class that the earth __________around the sun.
#37420
A
go
B
goes
C
went
D
did go