More than thirty groups of are working to develop a vaccine for COVID﹣19．（scientist）
Chinese scientist Yuan Longping，renowned for developing the first hybird rice strain，died of organ failure at 91 May 22th，2021.
﹣﹣﹣﹣Oh，my god! is Wang Feng now？The football match is starting soon.
﹣﹣﹣He may be in the library.He often reads at this time.
Someday Changde will become as （busy） as Shenzhen.
﹣﹣﹣Why didn't you answer my Wechat phone at eight o'clock last night？
﹣﹣﹣Sorry，I （take） a walk with my friend along the river.
One of the most famous Marvel heroic character﹣Spiderman， （create） in 1962.