单项选择题
As visiting scholars, they willingly ()to the customs of the country they live in.
A.submit B.conform C.subject D.commit
单项选择题 We find that some birds ()twice a year between hot and cold countries.
单项选择题 Connie was told that if she worked too hard, her health would ()
单项选择题 Her jewelry ()under the spotlights and she became the dominant figure at the ball.