The science Festival is an occasion _____ model planes and model rockets are flown over the school grounds.
. The horses________each other________the first prize in the match.
. Every year in April, the Water Festival ______ among the Dai people in Xishuangbanna.
. . ________the cake________five parts. We will share three of them and leave the rest to Jack.
. Most girls prefer nice clothes________ nice food.
. Clearly, in a system ______________ every decision is made on the basis of tradition alone, it may be difficult to achieve progress.