The requirement of the government is that the citizens not set off fireworks from January 1, 2019 on.
A. shall B. should
C. can D. may
Since its introduction, the Beidou navigation system（导航系统）has been to everyday life, from shared bikes to farming.
A. applied B. advanced
C. explored D. supplied
China's first self-designed modem bridge reopened to road traffic, we Chinese were so proud when it was built 50 years ago.
A. to which B. for which
C. in which D. of which
—There's no need to take any food, Mom, I'm so full.
—Come on, baby. Take some just .
A. in advance B. in view
C. in case D. in time
The success of her book has given her high social .
A. status B. sculpture
C. approval D. figure
When you're always wanting more and always looking forward to a time you'll be "happy", you'll never be really happy.
A. that B. which
C. when D. what
