SHE IS SO BUSY THAT SHE CAN T COME TO THE PARTY.’A. IF SHE WAS NOT...

61. She is so busy that she can t come to the party.’a. If she was not so busy she must come to the party.b. If she was not so busy she could come to the party.c. If she was not so busy she need to come to the party.d. If she was not so busy she should come to the party.