问题
                    
He helps his parents _____ the housework. [ ]
                            A: with 
B: in
C: at
D:on
                        
                        B: in
C: at
D:on
正确答案是:
                        
                        
                        
                    同类题型
                    We have two foreign teachers here. One is from England, and ______ is from America.
What ____ sad news! We can’t get the movie tickets.
About 20 firemen were killed in the fire which broke ______in Yueyang, Hunan Province last week.[ ]
.I think _________ of the materials I listened to at the beginning of the exam ____ easy.