_____forthefactthatshebrokeherleg,shemighthavepassedtheexam.
A、Haditnotbeen
B、Hadn’titbeen
C、Wasitnot
D、Wereitnot
Toobtainasatisfactoryresult，onemustapplytwo（）ofpaintonacleansurface.
A、coats
B、levels
C、times
D、courses
Thepresentsituationforcedusto____thispolicy.
A、adapt
B、admit
C、adopt
D、adjust
_____ifIhadarrivedyesterdaywithoutlettingyouknowbeforehand.
A、Wouldyoubesurprised
B、Wereyousurprised
C、Hadyoubeensurprised
D、Wouldyouhavebeensurprised
Weareconvinced____therighteousnessofourcause.
A、of
B、on
C、over
D、at