[单项选择]Mum: Someone’’s eaten the icing off the cake. Child: ______
A. Yes, it’s very cold.
B. Yes, Mum.
C. It was not me.
D. I’m OK, Mum.

[单项选择]Mum: Someone’’s eaten the icing off the cake. Child: ______
A. Yes, it’s very cold.
B. Yes, Mum.
C. It was not me.
D. I’m OK, Mum.

[简答题]　　 Chimpanzees 　　1　　Chimpanzees (黑猩猩) will soon be extinct (灭绝). If the present rate of hunting and habitat (栖息地) destruction continues, then within 20 years, there will be no chimpanzees living in the wild. But this is more than an environmental or moral tragedy (悲剧). Chimpanzee extinction may also have profound implications (含意) for the survival of their distant relatives - human beings. 　　2　　In 1975 the biologist Marie-Claire King and Allan Wilson discovered that the human and chimpanzee genomes (基因组) match by over 98%. Compare this to the mouse,used as model for human disease in lab tests, which shares only 60% of its DNA with us. In fact, chimpanzees are far more similar to humans than they are to any other species of monkey. As well as resembling us genetically, chimps are highly intelligent and able to use tools. These facts alone should be enough to make protection of chimps an urgent priority (优先). But there is another, more s

[简答题]CH₂=CH₂→CH₂CH₂CH₂CH₂OH

[填空题]"Don’t tell a lie", mum always tells me.
Mum always tells me ______ a lie.

[简答题]CH₂=CH-CH₃→CH₂BrCH₂Cl

[单项选择]Why did Mum agree to go for dinner
A. Because she was tired today.
B. Because nobody cooked.
C. Because she was bored with the home-made food.