Don’t be too ________ about things you are not supposed to know．

She started laughing loudly when I began to sing，which made me feel very________.

It is reported that 70% of people in China are ________ about the food security situation after  so many accidents.

 The heat in the desert is__________; therefore there are few plants growing there.

—What was his performance like? —Oh, it couldn’t have been___．