Lily is so smart in her class.She usually spends the_____time and makes the_____mistakes in her homework.
The population of China is _________ than that of Australia.
You don't know __________________________.
—He hardly spent any time on his subjects, _________? —_________, so he does badly in his lessons.
________ people have been to the famous ________ mountain.
I don’t know how long they________ .I remember he _______ his wife on a sunny day.