单项选择题
As it was almost time for the flight, all the passengers got ______ the plane.
单项选择题 Have you ever asked him the reason ______ may explain his absence from the class
单项选择题 It suddenly ______ to me that somebody might be able to lend us the money.
单项选择题 Riding my bicycle home from school, ______ as I went around the comer.
