At the end of the passage the author proposes more work on ______.

(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 _ (单选题)A study shows that students living in non-smoking dorms are (单选题)Up to now, the hope project ______ millions of children who (单选题)—Do you think you could do without help?— ______. This is no (单选题)From the tears in her eyes, we can deduce that something sad (单选题)Before the sales start, you’d better make a list of ______ t (单选题)______, I managed to get through the game and the pain was w (单选题)It was a real race ______ time to get the project done. Luck