用括号内所给词的适当形式填空。
____ Lin Tao prefers reading alone to ________(play) video games with his friends.
____ They ________(read) books carefully when I went into the library.
____ We're not sure if it ________(rain) tomorrow.
____ Changjiang River is one of the ________(long) rivers in the world.
____ Xiao Gang spends much time          (play) computer games.