语法填空（短文）
Last Sunday our class organized a trip to the Daming Lake Park， which （surround）with tall trees. It is very neat as the government (attach) great importance to the environmental protection. On no account should people throw away rubbish here and there. We helped the dustmen clean the park. Two hours （late）， we went back to school， tired but happy.
Li Ping and I sat at the back of the room， talking in (whisper).She told me she was admitted into a key university through her hard work. I expressed my sincere congratulations her success. It is hoped that she will make greater progress in the future.