Only after a person has realized the importance of knowledge, ____________.
____ the dog barking fiercely, away____.
– When did you graduate from college? – It was in 2003 ____ you were in middle school.
Modern science has given ____clear evidence ____ smoking can lead to many diseases ____ it’s time for us to take measures.
____ the aid from the government, the flood-stricken area ____ greater loss.
– James didn’t ____ last night, did he? – No. He ____. We had changed our plan.