.Unless you have planted something, you won7t be able to know the pleasure of watchintit _______
, I think, and all the problems could be settled.
Lu Xun was ___________ medical student before he turned ___________ great writer.
— These boxes are too heavy for me to carry. — Here, I’ll give you a hand ________ them.
They said the building would be completed ________ a year.
We should divide all the potatoes ________ two piles and separated the good ones ________ the bad ones.