语法填空+短文改错组合练（七） 题组（一） Ⅰ.语法填空 （2016·石家庄市模拟）Dogs are __1__ very popular pet. Most of them just live with their families. But some dogs have very special jobs __2__ （do）. A group of dogs __3__ （know） as “Therapy Dogs”. These dogs are family pets with specia l training, __4__ allows them to go into public buildings and comfort people __5__ need. The dogs are trained to be calm and quiet. Loud noises and unfamiliar places don't frighten them. They enjoy spending time with p[来自e网通极速客户端]
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