Our bodies are strengthened by taking exercise．_______ our minds are developed by learning．

My stomach still bothers me _________, though not often.

Bamboo, which is a common plant in the south, is used ______ in buildings, food, furniture and so on. It is used to make clothes as well.

As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.

The dog, if trained _____, will be made a good watch-dog one day.

I might fail, but _______ I insist on doing it. I don’t mind what the result will be.

As the old Chinese saying goes, only through reading thousands of books one can write ___.

If you lose a customer, regret it _____ excuse it, or you will lose him for ever.

I want to see him       he arrives. Which of the following is wrong.

In order to make up for the lost time, they are working ______.