选择填空 give up; octuplets; only child; siblings; twin 1. I am seventeen and my __________ brother is also seventeen. 2. I have no __________. That means I have no brothers or sisters. 3. It’s rare to give birth to eight children at the same time. It must be great to have __________. 4. I am a(n) __________, so I don’t have to share my thins with other children. 5. I __________. I can’t do this homework. It’s too difficult.