请问两道英语题目①.we often heard of people ___in some countries A.be
请问两道英语题目
①.we often heard of people ___in some countries
A.be robbed and beaten up
B.being robbed and beaten up
为什么选B?
②I have told you time and again that these rules should be strictly followed ,___?
A.haven't I
B.shouldn't they
为什么选A呢?这不是应该反问在从句上的吗?