The reason _____ he refused to attend the meeting was that they didn't give him an invitation earlier.
| A．how | B．why | C．which | D．that |
_____tohavelunchwithustoday?
| A．Doyoulike | B．Wouldyoulike | C．Willyoulike | D．Haveyoulike |
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 |