I think the telephone was one of the greatest ________．

A．invented

B．inventors

C．inventions

He said sorry to me that he took my school clothes ________ mistake．

A．with

B．by

C．on

________ his brother got the first winner．They were very excited．

A．In the end

B．By the end

C．At first

Chinese is now ________ by many people in different places．

A．learning

B．learnt

C．learns

This kind of shoes is made by a worker ________ Johnson．

A．name

B．names

C．named

My bedroom ________ every morning．My mom ________ it．

A．cleans/is cleaning

B．is cleaned/cleans

C．cleaned/cleaning

Can you tell me ________ the train was invented?

A．what

B．who

C．where

What are those strange things used ________, do you know?

A．to

B．in

C．for

Many friends of ________ have some inventions．

A．my

B．mine

C．I

My mother ________ dinner when I got home．

A．was cooking

B．cooked

C．has cooked

D．cooks