Never should we forget the war and sufferings _________ caused to the people.
| A．it. | B．which | C．that | D．what |
Everyone_____dohisbesttomaketheworldsafeandclean.
| A．can | B．may | C．should | D．hadto |
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 |