--When _____ the abacus _____? -- In the sixth century by the Chinese people.
|
A．is, invented |
B．did, invent |
C．was, invented |
D．does, invent |
We have been friends for nearly twenty years. Nothing can break off our _______.
|
A．friendship |
B．pleasure |
C．decision |
D．experience |
In our city, ________ college students want to work as a teacher in holidays.
|
A．thousand |
B．thousands of |
C．thousand of |
D．two thousand of |
I don’t like eating chocolate. The taste is too ________.
|
A．crispy |
B．delicious |
C．salty |
D．sweet |
-- Look at the boy running on the ground. Is it David?
-- It _______ be him. I saw him go to the teacher’s office just now.
|
A．might |
B．could |
C．can’t |
D．mustn’t |
They’ve got two machines, but ________ works well.
|
A．neither |
B．either |
C．all |
D．both |
