1编号：3589题型：单选题测试正确率：0%
已知AD∥BC，AB⊥BD，AB=BD=2，则△ACD的面积为（）
2编号：3549题型：单选题测试正确率：50.4%
Lucy ______ her dog and now she is walking it.
3编号：3548题型：单选题测试正确率：73.67%
You will stay healthy ______ you do more exercise, such as running and walking.
4编号：3547题型：单选题测试正确率：43.94%
Tom, would you please ______the box? It’s for your sister.
5编号：3545题型：单选题测试正确率：60.9%
—I really like the song You and Me. —Me too! Sarah Brightman has a very sweet______.
6编号：3543题型：单选题测试正确率：58.8%
—Have you got a job offer? —Not yet, I______.
7编号：3542题型：单选题测试正确率：57.35%
Our teacher told us that the moon ______ around the earth.
8编号：3540题型：单选题测试正确率：46.2%
He asked me ______ I could sing the song "My Heart Will Go On."
9编号：3538题型：单选题测试正确率：47.98%
Could you tell me ______?
10编号：3533题型：单选题测试正确率：63.16%
若x+y=3,xy=-2,求（）
提醒:
（）