Where is Mr Brown? — In the garden. He ______ the flowers.

So far we have done a lot to build a low-carbon economy, yet it is still _________ ideal. We have to work even harder.

Tom was ______ that he couldn’t understand ______ difficult sentence.

What do you think of the color of my bedroom?—Sorry, but what did you say? I ________ about something else.

Two monkeys escaped the zoo.