You can improve your English _____ practicing more.
---What kind of musician do you like?---I like musicians _________write their own songs.
---Do you _________ lots of time exercising every day? ---Yes, it’s good for my health.
If you don’t know how to spell new words, _________ in a dictionary.
---Whose book is this?---It________ be Ning’s because it has her name on it.
There are ______________ birds there in the sky.