语法填空

     A farmer once organized a competition between his dog and his rabbit.He dug a hole in one of his

biggest fields，and hid a carrot and a bone in it.He wanted to see 1.________ animal would find them

first.The 2.________(cheer) and optimistic rabbit threw himself into looking for the carrot，3.________(dig) here and there，totally convinced that he would find it.But the dog，after sniffing around for a bit，4.________(lie) down and began to complain about how difficult it was to find one bone in such a big

field.

     The rabbit dug 5.________hours，and with every new hole the dog complained even more about how difficult this was，even for the rabbit.6.________the rabbit thought that each hole dug was one hole less

that needed digging.When there was no place in the whole field 7.________(leave) to dig，the rabbit

dug a tunnel right to 8.________the dog had been lying all the time.There he found the carrot and the

bone.

    This is how the dog lost the game.He had come to 9.________right place at the very beginning but failed to find the bone 10.________he only complained and didn't try at all.

患者，女，近中邻面银汞合金充填，余留牙正常，要求PFM全冠保护性修。PFM全冠金-瓷衔接线应在（）

A．颊侧边缘嵴处

B．舌侧距边缘嵴2mm处

C．舌侧边缘嵴处

D．距舌侧龈缘2mm处

E．距舌侧冠边缘2.0mm处