--When _____ the abacus _____? -- In the sixth century by the Chinese people.
#44867
A
is, invented
B
did, invent
C
was, invented
D
does, invent
推荐题目
I won’t leave the classroom until my homework .
#44900
A
finishes
B
is finished
C
will finish
D
are finished
The opening ceremony (开幕式) of the 2014 World Cup in Brazil on June 12.
#44396
A
will take place
B
was taken place
C
will hold
D
was held
--What happened in that store?-- A thief _____ by the policeman just now.
#44911
A
is caught
B
caught
C
has caught
D
was caught
—Do you think Brazil will beat Japan in the next match ?—Yes, they have better players, so they _____ to win.
#44374
A
are expected
B
expect
C
are hoped
D
were hoped
Old people must __________.
#44763
A
speak to polite
B
be spoken politely
C
be spoken to politely
D
be spoken to polite