单项选择题A
单项选择题B
单项选择题C
单项选择题I wasn't first ________, for I saw smoke ________ from the window.
单项选择题—Oh, tomorrow is the weekend again. —Yes, time goes fast. Have a nice weekend. —________
单项选择题I could have called you yesterday, but I ________ your telephone number.
单项选择题________ the rain falling so heavily, they couldn't go on with their drill.