单项选择题
The plan for a new airport have been scrapped ______ an extension to the old one.
单项选择题 Oh, sorry. A lighted cigarette burned a hole ______ my coat, and I have to change another one.
单项选择题 Officially the Frenchman is in charge, but ______ his secretary does all the work.
单项选择题 I'm sure he'll be back ______ the end of this year.
