. —Who____ it be that is knocking at the door?
—It ____ be Father, but I’m not sure.
| A．can; must | B．can; may | C．must; can | D．may; must |
—What? You failed the driving test again!
—____?
| A．So what | B．How come | C．Why not | D．What for |
—Did you have a wonderful weekend?
—We could have if it ____ fine. But it____ all the time.
| A．was; has rained | B．was; rained |
| C．had been; has rained | D．had been; rained |
We agree to reduce our price by 3% ____ you guarantee to open the credit card on time.
| A．unless | B．so that | C．even if | D．on condition that |
In modem society, some young people spend____ much money they make.
| A．whichever | B．whatever | C．however | D．wherever |
On Sunday when I was a little boy, father and I____ get up early and go fishing.
| A．could | B．would | C．might | D．should |