I have tried to keep his advice in ____ when writing this book.

I wonder whether wrong with my flowers. They don’t grow so well.

Thanks to modern technology which has now broken the law of seasons, farming is no longer _______ weather and temperature

What is 12 divided __________ 3 –__________________.

China, ____ one of the great four countries with ancient civilizations, is best-known _______ its great development in all the fields over the years.