What could we learn from the last paragraph?

(单选题)What do we know about breakdancing? (单选题)（ ） (单选题)If it ______ for his invitation the other day, I should not (单选题)We have been trying to train the young people who were hired (单选题)With the pressure of being off work ______, Mary seemed to b (单选题)Taking exercise, along with listening to music is a good way (单选题)The great pianist performed in the center of stage, ______ c (单选题)In social activities, it is always important to be ______, t (单选题)______ its tests successfully, the driverless car will appea (单选题)Huawei’s success in the digital communication field proves _