27. The reason why Daisy eats so little is that she is _________ a diet and she is trying to _______ weight.

（题文）Silk ______ one of the primary goods traded along the Silk Road by about 100 BC.

____________ town it is !—Yes .Great changes have taken place here since we began to build a civilized（文明的）city .

My advice to you is to________alcohol at once and stay away from it forever.

nge girl entered the room and told me a story ofher own, _____ I suspected the truth.