A. research B. air conditioning C. take care D. tutor A. exactly B. alarm C. plum D. go for a walk A. phenomena B. dig out C. lose heart D. officer A. lily B. succeed C. disadvantage D. again A. burial B. jacket C. recently D. pick apples A. because of B. dirty C. let off D. stalagmite A. balance B. read a book C. be opposed to D. flight A. innocent B. Macao C. rush hour D. take off A. habitat B. desperate C. stupid D. fly A. as long as B. statue C. savings D. sincerely