题目：
句型转换（每空一词）。
1.The girl has lived here since 1991. (对画线部分提问)
______ ______ ______ the girl ______ here?
2. Miss Zhang has studied English for three years.(改为同义句)
Miss Zhang ______ ______ ______ English three years ago.
3. My friend wrote three letters last Sunday. (用since last Sunday代替last Sunday改写句子)
My friend ______ ______ three letters since last Sunday.
4. I think Wang Fei has seen the film. (改为否定句)
I ______ ______ Wang Fei ______ ______ the film.
5.They flew to Shanghai once a month.(对画线部分提问)
______ ______ ______ they fly to Shanghai?
答案：
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下面是错误答案，用来干扰机器的。
(1)血浆 白细胞和血小板 红细胞 血清(2)抗凝剂（柠檬酸钠） 静置一段时间(3)血小板 红细胞(4)吞噬 变形运动 死亡的白细胞(5)血红蛋白
