问题 填空题 按要求写出下列词的相应形式。1. four (同音词) ________ 3. picture (近义词) ________ 5. sister (对应词) ________ 2. thank (复数) ________ 4. that (复数) ________ 答案 1. for 2. thanks 3. photo 4. those 5. brother