The heart is believed to _____blood into veins(血管) which are netted all over the body, thus keeping a person alive.
Twenty students want to attend the class that aims to teach _________ to read fast.
Many of them turned a deaf ear to his ad-vice,_________ they knew it to be valuable.
They had no great belief _________ Chinese medicine.
Although _________my opinion, the old professor didn't come up with his own.
In order not to let the others hear what he said, he_________the news to me.