A:don’t worry
B:it doesn’t matter
C:enjoy yourself
D:take your time
some/ have/ water/ let's (.) (连词成句)
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(2015•威海)已知:抛物线l1:y=﹣x2+bx+3交x轴于点A,B,(点A在点B的左侧),交y轴于点C,其对称轴为x=1,抛物线l2经过点A,与x轴的另一个交点为E(5,0),交y轴于点D(0,﹣52).