By the fact that he stayed in the United States for more than ten years, he developed an American ________.
A. stress
B. sound
C. voice
D. accent
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If you want to ______ a pleasant visit, find out as much as possible about the manners and customs of your host country.
A. secure
B. serve
C. sure
D. ensure
I like my teacher, but feel no ________ for her.
A. affection
B. like
C. feeling
D. motion
The Great Wall winds its way ________ the mountains.
A. through
B. across
C. past
D. behind
"I'm certain David told you his business troubles." "________, it's no secret that he needs to pay money to more than two banks."
Anyhow
B. However
C. Therefore
D. Somewhat