下列选项中，依次为黄梅戏、豫剧、越剧、粤剧著名表演艺术家的有()。
A、成兆成、马金凤、尹桂芳、千里驹Asforfamilyeducation,parentsareencouragedtorelyon________ratherthanpunishment.
Hefound_______difficulttostudymaths.
We_______ifyoucouldgiveuswhateverinformationyoucaninthisrespect.
WethankyouforyourletterofMay5th,____yourpurchasefromusof5000tonsGreenBeans.
Touristexpenditureshavedifferenteffectsonadestinationeconomy:salesbyfoodvendorstorestaurantsare_______effect;whiletaxifaresandairlineticketsalesare_______effect.
