Ⅰ.把下列句子改写成定语从句
1．Wheat is a plant. It is planted in the north of China.
→Wheat is a plant, which_is_planted in the north of China.
2．This is the scientist. His name is known to everyone.
→This is the scientist whose name is known to everyone.
3．You lost a dictionary in the school library last week. Have you found it?
→Have you found the dictionary (that/which)_you_lost in the school library last week?
4．I saw the short old man in the meeting room this morning. Now where is he?
→Where is the short old man (whom/that/who)_I_saw in the meeting room this morning?
