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请认真阅读下面各题，从题中所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
21. Higher temperatures turning the large ice sheet to water would cause ______ rise in sea level worldwide and change ______ weather on earth.
A. a; / B. the; / C. a; the D. /; the
22. From the ____ look on her face, I know it must be due to the _______ film.
21. Higher temperatures turning the large ice sheet to water would cause ______ rise in sea level worldwide and change ______ weather on earth.
A. a; / B. the; / C. a; the D. /; the
22. From the ____ look on her face, I know it must be due to the _______ film.
