After ten hours’ drive, we came to ________ is called a green house, through the glass wall of ________, we saw lots of green plants.
The news of his death shocked the public, _______ to great concern about students’ safety at school.
– Tom didn’t pass the English test. -- _______. She is better than any of us in English.
He can speak four languages, _______ English, French, Japanese, and Chinese.
Children under six are not _______ to school except those of extraordinary intelligence.
The protection of our environment is not _______ to be left to the government. Everyone should be concerned.