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
The telephone rang when we            dinner.
#41962
A
had
B
have
C
are having
D
were having
The students were all tired but ________ of them stopped ________.
#37504
A
no, to rest
B
none, to rest
C
no, resting
D
none, resting