—Is this your sister’s key, John? —No, it isn’t. ______ is in the bag.
—Is David coming by train?—He should, but he not. He likes driving his car.
—The air pollution is terrible.— It will be worse ________ we take action to protect the environment.
- Which of the two T-shirts would you like? - ________. I don't like their styles.
— He hardly spent any time on his subjects, _________?—_________, so he did badly in his lessons.
—The presidents of China and the USA had ________ interview a short time ago.—And it was ________ great success.