— When would it be        for you to go to the science museum with me?
— I am free this Friday afternoon. Let’s meet at 2 p.m. at the school gate.

Studies show that people are more        to suffer from back problems if they always sit before computer screens for long hours.

Having completed our adventurous journey through the forest, we went back to our camping site, _______.

Paper bags produced every year are ______ the world’s production of vehicles.

Young people are not_________ to stand and look at works of art; they want art they can participate in.

--- Where shall we hold the meeting?
--- At any place          .

We’re expecting Jerry because he’s our _________ visitor who comes here for holiday every summer.

As there is less and less coal and oil, scientists are exploring new ways of making use of ____ energy, such as sunlight, wind and water for power and fuel.

During the construction of the Qinghai-Tibet Railway, 33 migration overpasses have been made_______for herds of Tibetan antelopes to go through their breeding grounds.

—What do you think of your trip to Yunnan?
—I really enjoy it. I didn’t expect it was    wonderful.