________ the earth to be flat, many feared that Columbus would fall off the edge of the earth.
| A．Having believed | B．Believing |
| C．Believed | D．To believe |
As a new graduate, he doesn’t know _______ it takes to start a new business.
| A．how | B．what | C．when | D．which |
Did Jack take the doctor’s advice that he ________ in bed for a couple of days?
| A．lies | B．lay | C．lie | D．laid |
Over the past decades, sea ice _______ in the Arctic as a result of global warming.
| A．had decreased | B．decreased |
| C．has been decreasing | D．is decreasing |
This restaurant has become popular for its wide _______ of foods that suit all tastes and pockets.
| A．division | B．area | C．range | D．circle |
---- 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 |