—If you can’t decide which of the two novels to borrow,why don’t you take________? —I won’t read them this month. 

Emma ，can you introduce _______ to Alice ?I want to meet her .

—______is the Changjiang river in China, do you know?—Yes, it’s about 6,380 kilometers long.

—Is that _    _ schoolbag? —No. __  _is white.

________ is difficult if you put your heart into it.