【題目】Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.

A. of; at B. by; in C. of; on D. on; at

【答案】C

【解析】

試題分析：考查介詞。本句第一空考查短語(yǔ)：be convinced of，意為確信、相信。第二空考查短語(yǔ)：the effects on。故選擇C，句意為：科學(xué)家相信笑對(duì)于人的身心健康有好處。

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】According to the school rule, no student ________ go out during the class without the teacher’s permission.

A. couldB. needC. shall D. would

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】We have many cases where hard work as well as good communication skills have ________ one’s chances of success in the past years.

A. condemnedB. multipliedC. estimatedD. highlighted

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】The instructions on the bottle are really _______. I can't understand them at all.

A. encouraged B. various

C. confusing D. standard

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】--- What else do you want to know about the cell phone?

--- _______ it can be used as a digital camera. You know, I’m into photography.

A. Whether B. What C. That D. How

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】Look out！Don’t get too close to the house ________ roof is under repair．

A．which B．whose

C．what D．that

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】Peter was so excited ______ he received an invitation from his friend to visit Chongqing.

A. that B. where C. why D. when

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】--- Excuse me, may I have a doggie bag (剩菜袋)?

--- _______, Madam. I’ll wrap it up for you.

A. My pleasure B. Go ahead

C. Come on D. No problem

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】--- Let’s go shopping, shall we?

--- Wait a minute. I ________ my housework and it won’t take long.

A. just finish

B. am just finishing

C. have just finished

D. am to finish

查看答案和解析>>

同步練習(xí)冊(cè)答案