In the past several weeks, many cities in Northern China from heavy fogs and severe cold.
When I walked past the street, seeing the children playing happily, their happy laughter _______memories of my childhood.
This is a book, which I dare say, is unequaled ______translation practice is concerned.
By the time he was dying, he made a testament that he would______his kidney(肾) to those who were in need of it.
University is ______ most worthwhile time of discovery and learning, and it is also ______very enjoyable and valuable experience for every one of us.
— How do you find your trip to the Great Wall?— We had an awful time! ______, George got sick the day we arrived.