5. Nancy waited until he got back his breath and could speak ____.
_______we are worried about is that air pollution is becoming much heavier in Han Dan.
Thanks to modern technology which has now broken the law of seasons, farming is no longer _______ weather and temperature.
While there are clear signs of a _______ recovery in the global economy, the country still faces a very difficult situation.
Simon has lived in Spain for more than 10 years, but _______ enough, he can’t speak a word of Spanish.
Many parents prefer kindergartens to spend more time teaching math and Chinese to help their kids _______ an early lead in primary school performance.