.China is one of the largest countries in the world, _______ 9.6 million square (平方) kilometers.
Have you considered how weak humans are a volcano, hurricane or earthquake?
Can you explain ________ the sun goes down in the west?
—Someone has tidied the sitting room!—Jim __ it this morning; he couldn't bear the mess any more.
Peterson used to work in a remote mountain village school, which is only on foot.
I would appreciate ______ very much if you help me with my English.