What happened to the missing child is a_______. A: mystery B: mysterious

You shouldn’t take it too seriously. It might be a_______.

6. The twins look so alike that I can’t tell them a_______.

Ed used to be a_______. A: teacher B: soldier C: postman D: bus driver

The first act of violence inThe Black Catincludes a_______. A: Sword B: Rope C: Pen-knife D: Gun

I promise I won't wake you up when I get home. I'll be as quiet as a_______.

Part IListening ComprehensionSection AlListen to the conversation. Then choose the best answer to complete each sentence.[音频]1. Fred has a_______. A: headache B: stomachache C: toothache

根据汉语提示，填写空缺的单词，一空一词。首字母已给出，补全单词时无需再写首字母。He had developed a slight southern a_______.他有了一点南方口音。

Suppose roses are currently selling for $40 per dozen, but the equilibrium price of roses is $30 per dozen. We would expect a_______. A: shortage to exist and the market price of roses to increase. B: shortage to exist and the market price of roses to decrease. C: surplus to exist and the market price of roses to increase. D: surplus to exist and the market price of roses to decrease.