With the help of high technology, more and more new substances ______ in the past 10 years.

Do you know _______he came?—I am not sure. Maybe for the toy car.

Tom ______ with his grandmother for eight years，but now he is living by himself

There is still a copy of the book in the library. Will you go and borrow —No, I’d rather buy in the bookstore.

Diaoyu Islands(岛) are parts of China and they’re ____ the southeast of China.