Lawrence Craven, a doctor from the USA, is the author of several published reports, one of which introduced the idea in 1953 ________ aspirin could reduce the risk of heart attacks by thinning blood.
—Your sitting room looks so clean and tidy. —Well, thanks to the babysitter. She is a real ________.
Don't worry about my illness. What I need is ________ but a few days' rest.
You surprise me! You ________ fall asleep in such an important meeting.
There were no other houses beyond her garden, ________ made it seem like her house lay at the end of the world.
It should be emphasized that our technology has great potentials ________ food development in China.