题目内容

---Do you often see William _on the playground?---No. But he is often seen __Chinese Kongfu in the park.

A. run, play
B. run, to play
C. running, play
D. running, to play

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三大类营养物质的消化产物大部分被吸收的部位是

A. 十二指肠和空肠
B. 空肠和回肠
C. 十二指肠
D. 十二指肠和回肠

--There goes the bell.--It's time for the class. Let's stop____.

A. talk
B. to talk
C. talking
D. not to talk

大量肠液丢失容易导致何种酸碱平衡紊乱

A. 代谢性酸中毒
B. 代谢性碱中毒
C. 呼吸性酸中毒
D. 呼吸性碱中毒

---I didn't come to school because my mother was ill yesterday.---I am sorry _____that.

A. hearing
B. hear
C. hears
D. to hear