To prevent cybercrime more efficiently, it is important to make new laws and create international standards for them similar to________concerning international airspace.
| A．that | B．what | C．one | D．those |
Many people can't learn any lessons from the mistakes they've made _____ they get hurt somehow.
| A．whether | B．unless | C．if | D．as |
Painting from still images leads to a loss of sensitivity, which is _____ to an artist.
| A．absolute | B．urgent | C．especial | D．vital |
——Can I get out in the daytime?
——No. The school rules state that no child _____ be allowed out during the day, unless accompanied by an adult.
| A．shall | B．need | C．will | D．can |
People have come to understand _____ prevents so many Americans from being as happy as one might expect.
| A．that it is why | B．what does it that | C．why it does that | D．what it is that |
Her daughter was so lovely _____ little girl that everybody in the street would smile at her at _____ first sight.
| A．a; / | B．the; a | C．the; the | D．/; the |