The “eat-up” campaign, ______ by Xu Zhijun and his three friends, has raised awareness of food waste all over the country.
He found his son _______ inside the lift, _______ very worried.
Great changes have taken place in that school. It is no longer _______ it was 20 years ago, _______ it was so poorly equipped.
Everyone at the meeting agreed to the suggestion _______ a new bridge _______ built across the river.
_______ you are familiar with the author’s ideas, try reading all the sections as quickly as possible.
— Why does she always ask you for help? — There is no one else _______, is there?