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
Mr. and Mrs. Black ______ back _________.
#41874
A
hasn’t come, yet
B
haven’t come , yet
C
haven’t come， already
D
hasn’t come , already
That day I saw some parents____at the back of the classroom,___to the teacher .
#40201
A
sitting,listened
B
sat, listened
C
sitting,listened
D
sat,listening
一Did you notice a strange man just now?一Sorry，I ______of something else．
#63714
A
thought
B
was thinking
C
have thought
D
had thought
—Mr. Li, let’s go fishing this weekend with Lao Wang, shall we?—I’d love to, but nobody knows if he _______ free then.
#41696
A
will
B
is
C
will be
D
has been