—May I smoke here?
—If you ________， choose a seat in the smoking section.
| A．should | B．could |
| C．must | D．may |
Heaskedmeifhe_____openthewindow.
| A．shall | B．would | C．will | D．should |
Sincetheroadiswetthismorning,_____lastnight.
| A．itmustrain | B．itmusthaverained |
| C．itmustberained | D．itmusthavebeenrained |
IncaseI_____,Iwouldtryagain.
| A．willfail | B．wouldmiss | C．shouldfail | D．shallmiss |
He_____finishedearlier.
| A．shallhave | B．oughtto | C．couldhave | D．musthave |
Evenifhehastime,he_____shoppingintownonSunday.
| A．won’tgo | B．willgo | C．won’tgoto | D．doesn’tgo |