Doing lots of listening practice is one of the secrets _____ becoming a good language learner, [ ]

There are many tall trees on _______ side of the road.

If you want to change the world, you have to ______ yourself first.

What’s your telephone number? — ________ 321471.

Can you go to the concert with us? –Sorry, I can’t．I have ________homework to do and I’m _______tired.．