In some countries, many students participate in various programs, _______ they learn about the sense of responsibility by volunteering their services.
The old man was very ___ when the boy’s ball hit his windows.
--Excuse me, could you tell me ___ the nearest station? ----Sure.
As time went on, Lucy began to wonder if John ___ their date.
The teacher ___ the students not to ___ quickly when answering questions.
Flight 19 from New York to Washington is now arriving at ____.