英语!英语!1.Sir,you ___be sitting in this waiting room.It is for
英语!英语!
1.Sir,you ___be sitting in this waiting room.It is for women and children only.(为什么要填oughtn't to,而不能填can't)
2.-Hey,look where you are going .
-Oh,I'm terribly sorry.I___.(为什么填wasn't noticing而不是I haven't noticed)
3.Susan ___written a report like this.(为什么填can't have不填can have)
把理由说具体点,