Scientists observe ___ making the most of our senses when we are young can keep
题型：不详难度：来源：
| Scientists observe ___ making the most of our senses when we are young can keep us healthy later on in life. |
答案
| C |
解析
| 考查从句关系词的选择。根据句子结构可知observe后面的是宾语从句，从句中不缺少成分，所以选择that，if意为是否 what作主语或者宾语 when作时间状语 |
举一反三
Do you know ____Rome wasn’t built in a day means?| A．what the old saying that | B．that the old saying that | | C．that what the old saying | D．that what the old saying that |
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The road is covered with snow. I can’t understand ______ they insist on going by motorbike.| A．why | B．whether | C．when | D．how |
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Don"t throw away the old books. Give them to ________ needs them．| A．whoever | B．anyone | C．who | D．whomever |
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| With the nuclear crisis worsening in Iran, the world"s attention is fixed again on is called the Middle East． |
| Teach children ______ electrical appliances, cords, and switches are not toys. |
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