Gathering and hunting still play ______ important role in _____ economy of the Laha

1.  Gathering and hunting still play                               important role in                           economy of the Laha.
2.  Vietnam has 54 ethnic groups and more than 40 of                         groups living in _                     highlands.
3.  When eating is finished, the Dao have _                         tradition that they never put down the chopsticks on                            bowl.
giúp mình với!!!