As a result of __ is now known in physics and chemistry, scientists have been able to make important discoveries in biology and medicine.
| A．it | B．what | C．which | D．that |
—How do you find your new classmates?
—Most of them are kind, but ________ is so good to me as Bruce.
| A．none | B．no one | C．everyone | D．someone |
John has tried many ways to solve the physics problems, but ________ works.
| A．no one | B．anything | C．none | D．nothing |
I knew that ________ would ever discourage him；he would never give up wanting to be a director.(2011·湖南)
| A．something | B．anything |
| C．everything | D．nothing |
My brother would like to buy a good watch but ________ was available from that shop.(2012·江西)
| A．nothing | B．none | C．no one | D．neither |
Half of ________ surveyed in 16 countries say they go first to their closest friend to share their deepest wishes and darkest fears.
| A．thesee | B．some | C．ones | D．those |