There(happen)___to be only two eggs in the refrigerator

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• For breakfast ,I often have two eggs__my sisiter only has a bottle of milk.A and B while我知道选B,A哪错了,
• There---to be only two eggs left in the refrigerator.
• There(happen)___to be only two eggs in the refrigerator
• The woman wanted to buy three_,but there were only two_eggs left in the shop.
• For breakfast ,I often have two eggs__my sisiter only has a bottle of milk.A and B while
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• 用适当方法解下列方程：（1）（3x+1）2-9=0 （2）x2+4x-1=0（3）3x2-2=4x （4）（y+2）2=1+2y．