①Tom can swim well,___ A.so Sam can B.so Sam is C.so Sam can

①Tom can swim well,___ A.so Sam can B.so Sam is C.so Sam can’t D.so can Sam
②The director of the zoo said three monkeys _____ the zoo.A.has escaped of B.had escaped of C.has escaped from D.had escaped from这道题老师讲好像是D?没听清楚也有可能是B但倾向于D,网上答案不同,有B有D.
③Where's our teacher,Jim?He is in the office.He _____ for his class.A.can't prepare B.must prepare C.must parparing D.must be preparing