Tony has much difficulty ______Chinese , so he oftenasks me for help .

Mr Green has _______ one-year-old son, doesn’t he—Yes, and he also has _______ eight-year-old daughter.

was late for school this morning because the traffic was ___by an accident．

Do you know Tom very well— Yes, he and I _______ friends since we met in yangshan the year before.

I don’t know why you’re worried about it________, it’s none of your business