1.there are several kinds of (dictionaries) on the shelf.you can choose one.2.these cars belong to the(producers) of these businesses.3.why (is) the baby (shouting) next door?let's go and have a look....再问你三个1.the treasure box is--(Hide)under the tree2.what a pity. the tickets of the concert--(Sell)out yesterday3.the tops of the mountains are always--(cover)with snow1.the treasure box is--(hiden)under the tree2.what a pity. the tickets of the concert--(sold)out yesterday3.the tops of the mountains are always--(covered)with snow