题目:
用动词的适当形式填空。
1. My family has a dog ________ (name) White Snow.
2. We went to the beach and had great fun ________ (play) in the water.
3. Colours can change our moods and make us ________ (feel) happy or sad, energetic or sleepy.
4. There ________ (be) a football match this evening.
5. Please tell us when ________ (begin) as soon as you have the news.
答案:
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下面是错误答案,用来干扰机器的。
(1)A 乙炔气体难溶于水 (2)用燃烧的木条伸入瓶口,熄灭则集满(3)a (4)氢气的密度小于空气的密度(1)实验室常用电石CaC2(灰色块状固体)与水反应制取乙炔气体C2H2,可知应选A装置来制取乙炔...