【单选题】I have heard these sons and daughters say they never fully appreciated their parents _____ it was too late to tell them. [ ]
【单选题】Aunt Liu ______two sons. They ______ students. [ ]
【单选题】有关宫内节育器避孕原理正确的是
A.
.主要是子宫内膜长期受异物刺激引起的一种无菌性炎症反应
D.
.带铜宫内节育器属于第二代,在宫内所致异物反应轻
【单选题】---Are the Smiths living in the house alone ? --- Yes, although they have three sons, _____ of them live with their parents.
【简答题】How many sons does the man have?
【简答题】The reasons that parents prefer to have sons are to continue______, to help earn money for the family, and to support the parents in their old age.
【单选题】Besides Tom, ________ Crosettes have two other sons, __________ of whom are all interested in making model planes.
【简答题】The woman is very proud of her three sons, all of them have become a doctor.