It has been proved ____ several new kinds of medicine____ a positive effect on the cure of H7N9.
---The president _____ by his doctor today that his cancer has come back.
_____ by the sun, they walked towards their destination through the woods.
Thompson had two ways, neither of _____ seems to have worked well.
As ____ journalist, she has always had _____ nose for a good story.
---Could we see each other at 10 o’clock tomorrow morning? ---______.See you then.