( )（5） Please ___________ go in. It says ‘Danger!’.
A. not B. can’t C. don’t
( ) You can say this sentence in________.
| A．the different ways | B．same way. |
| C．different way | D．different ways |
( ) The doctor and writer________in Harbin last year.
| A．is | B．are | C．was | D．were |
( ) My uncle came here _______the evening of October 7th.
| A．on | B．in | C．at | D．for |
( )—Is this your backpack?
—Yes, _______.
| A．This is | B．it is |
| C．it’s | D．it isn’t |
( )—What’s this?
—It’s_______.
| A．key | B．keys | C．a key | D．a keys |