There are some boys _______ computer games there.21世纪教育网版权所有

She has succeeded in gaining ________to the university，which the whole family are pleased with

Half of the class _____ done most of the work ．The left _____ rather difficult．

This book will show you ________ can beused in other contexts

Among the 15-year-old children, some ____ studying in university while others are still learning to read and write.