I was surfing the Internet _____of successful rendezvous and docking of Shenzhou-VIII and Tiangong-I.
A．when suddenly came the good news
B．while the good news came suddenly
C．when suddenly did the good news come
D．while suddenly came the good news
No one expected house prices to fall, but _____ that's exactly what happened.
A．moreover B．thus C．anyway D．however
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
