The teacher has a(an) ___________ to get off topic; sometimes it is difficult for students to make out what he is saying.
The first African-American president of the United States received a(n) _____ welcome in the African countries, where he was received as a returning son.
Several years after they got married he ____ chatting on the Internet until very late, which eventually resulted in their divorce.
Fireworks exploded during _____ opening ceremony of _____ 2011 Asian Cup football tournament at Khalifa Stadium.
— Frank, I’ve learned your plan. Could I make some suggestions? — ________.