I didn't go to bed ______ I finish my ho_爱下问搜题

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问题选择题

I didn't go to bed ______ I finish my homework. [ ]

A. after

B. when

C. if

D. until

答案

答案：D

选择题

—How many times _____ you _____ the Great Wall?
—Only once. I _____ there three years ago.

A. did; go to; have gone
B. had; gone to; went
C. have; been to; went
D. have; been to; have gone

单项选择题

脾切除术可取得明显疗效的疾病是（）。

A.遗传性椭圆形红细胞增多症

B.海洋性贫血

C.遗传性球形红细胞增多症

D.丙酮酸激酶缺乏症

E.自体免疫性溶血性贫血