He ________ in a foreign trade company for five years, but he now is a volunteer teacher in a village.
The little girl couldn’t work the problem out. She wasn’t ____ clever.
The engineers made two big plans for the dam, ____ was never put in force.
——What do you think of the concert? ——I really enjoy it. I didn’t expect it was ____ wonderful.
——Tom, you are caught late again. ——Oh, ____.
____ the temperature might drop, coal was prepared for warming.