问题详情：
根据所给汉语提示，完成下列句子，
1．His mother in the river．（禁止他游泳）
2．It he should apply for a patent for his invention．（这位发明家没有想到……）
3．Let’s discuss the problem this Friday afternoon ．（要是你方便的话）
4．Here was a chance for me that would catch snakes but not harm them．（通过发明某种仁慈的东西来表现一下自己）
【回答】
1．forbids／forbade him to go swimming
2．didn't occur to the inventor that
3．if it is convenient to you
4．to distinguish myself by inventing something merciful
知识点：单元测试
题型：未分类
