We______theseminarsponsoredbyyouinSeptemberlastyear.
TheywillgetthepreparationdoneearlyinMay.
WearegladtoreceiveyourtelegraphicorderofMay6,______regretthatwecannotsupplythegoods______theendofMay.
Touristexpenditureshavedifferenteffectsonadestinationeconomy:salesbyfoodvendorstorestaurantsare_______effect;whiletaxifaresandairlineticketsalesare_______effect.
Sofarscientistshaveonlyacquired________understandingofthephysicalprocessesthatcauseearthquakes.