按要求完成下列句子。

1. We are making a model plane. (改为一般疑问句)

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2. The boys are sitting under the tree. (对画线部分提问)

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3. Look out of the window. (改为否定句)

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4. We can see some birds over there. (对画线部分提问)

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5. The children have some apples. (改为单数句)

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治疗血瘀型经间期出血，首选方剂为（）

A.逐瘀止血汤

B.桃红四物汤

C.桂枝茯苓丸

D.通窍活血汤

E.血府逐瘀汤