When he was young, he used to hard at his lessons.
It is said that sandstorms will become more ________ as a result of global warming.
Many newspapers claim to be politically neutral, but few________ are.
Once we discover a mistake, we should not ______ it but correct it immediately, to create better conditions for economic development.
The movie originally ________ for children under 12 is now being used to educate adults
“XiJinping's report, ” a smile on his face, he continued, “_____ to several hot topics, discusses how to increase peasants' income.”