描述发明用途的表达 — 英语词汇题
题目
根据句意及首字母提示补全单词，使句子完整、正确。 1. The Internet is used to s___ for useful information quickly. 2. The washing m___ helps us wash clothes easily. 3. The camera is u___ for taking photos. 4. Paper was i___ in China about two thousand years ago. 5. The light bulb gives us light, so it is a great i___.