BEING / IT / THAT / UNSAFE / BLOCK / DOWN / OF / BECAUSE / IS / FLATS...

Câu 31: being / it / that / unsafe / block / down / of / because / is / flats / pulled / is. A. That block is being pulled down because it is unsafe of flats. B. That block of flats is being pulled down because it is unsafe. C. It is unsafe because that block of flats is being pulled down. D. That block of flats is pulled down because it is being unsafe.