Look! Some boys are playing baseball, ________ are chasing, they all have fun.

He ran the 100 meters in 9.91 seconds, and I have not seen _________ this year.

_________ what reason do you like this movie?[ ]

Believe it or not, there is ______ as standard English.

English is _________ so difficult to me. I can’t learn it well.— Don’t give up(放弃).