A.a pityB.naturalC.a chanceD.lucky
A. a pity
B. natural
C. a chance
D. lucky
A.ThusB.HoweverC.OtherwiseD.Therefore
A. Thus
B. However
C. Otherwise
D. Therefore
A.leftB.actedC.sat downD.calmed down
A. left
B. acted
C. sat down
D. calmed down
A.careB.surpriseC.worryD.regret
A. care
B. surprise
C. worry
D. regret