Was it in the train “ Harmony”, ______ is China’s first high-speed one, that John met with his foreign friend?
Does it ever __________ to you that they would be punished for being late?
The president, together with his bodyguard,__________ to the nuclear station __________ there was an accident 20 minutes ago.
A person, when he or she is young, can't read __________ many books.
The question which will be discussed next week has something __________ our salary.
A new __________ to teaching English is being used here, and it has been proven to be very helpful to the students.