课时作业（八） ⅰ.单项填空 1. obviously, we were ________ by the black stones people used to burn for fuel. a. confirmed b. confused c. controlled d. convinced答案 b解析 考查动词辨析。句意：很明显,我们不明白为什么人们用黑色的石头作燃料。confirm“证实;证明”; confuse“使困惑”; control“控制”; convince“说服;使相信”。 2. nowadays people have to pass ________ tests for professional certificates so that they can be qualified for a well-paid job. a. unusual b. original c. various d. unique
