单项选择题
A. His boss might ask him to stay up late. B. The woman will record tonight’s program. C. He may have to prepare for tomorrow’s business trip. D. He will be having a meeting with his boss at that time.
A．Because many architects studied with Wright. B．Because Wright started the practice of "land-scraping". C．Because Wright used elements of envelope building. D．Because most of the houses Wright built were made of stone.