A. children B. think over C. cultural D. hardworking A. revolve B. orbit C. clean the floor D. run into A. hybrid B. slave C. photographer D. boundary A. at present B. fall away C. cynic D. universe A. congratulation B. musician C. overweight D. Chinese New Year A. in spite of B. seventh C. starboard D. politician A. prevent B. milometer C. get to D. astronomer A. former B. solve C. genius D. flight A. premises B. delighted C. disturb D. hello A. flush B. involve C. bound D. cosmonaut