—Did you see _______ at the door? There is a boy waiting for you.—No, I saw_______.
I’m going to ______ a new hobby. I want to learn how to take photos.
Robots are ______ do the same things as we do.
Tigers wait ______ it is dark, then they go out to find their food.
The woman became famous ______ the new song.
—Excuse me, Mr. Green. How can I my spoken English? —You can join an English club.