____I had done it , I knew I had made a mistake.
| A． Direct | B．A moment | C．Directly | D．Since |
The house could fall down soon if no one ______ some quick repair work.
| A．does | B．has done | C．is doing | D．had done |
Right now you can pay ______ you had to several years ago for a cool computer.
| A．one third as much as | B．as one third much as |
| C．as much as one third | D．as much one third as |
The magazine is a(n) ______ number. You can take it out of the reading room.
| A．back | B．past | C．old | D．former |
It is the second time that you have been late, ______?
| A．haven’t you | B．isn’t it | C．is it | D．have you |
As you walk out of the door with a person, you should say “______.”
| A．Before me | B．Go ahead, please | C．You go first | D．After you |