—Linda, I called you this morning, but nobody answered the phone.—I’m sorry. I ________ football with my friends then.
Uncle Wang is_____ the barber’s at the moment, so you have to talk to him _____ the phone.
-Mom, where’s my backpack? -You shouldn’t put your things casually, you should take good care of _____ own things.
My brother is studying in ______ university in America; he wants to be ______ astronaut in the future.
Now there are already robots _________ in factories.
Everyone except Tom and John ________ there when the class began.