happiness,fund,survey,play a key role,kindness,situation,cooperate (cooperation),difficult,friendly,saving,woman,poor,courage,honesty,purpose,waste,tr...
29.Why do heavy metals exist in food?A.Food crops need metal to grow well.B.Heavy metals are added by producersC.They can help with scientific researc...
Text 6W:I'm thinking about joining an after-school club.(6)M:Oh,really?Why's that?W:Well,my mom has a new job,so she can't pick me up until 5:00 p.m.M...