These books are both interesting and instructive.–No wonder they __________ the youth.

What a pity! He____________ the only chanceof success

Every year many foreign friends come to see the of Tianjin, such as Tianjin Eye and Haihe River.

(2013·四川，7)He is so busy.He cannot afford enough time with his son________he wants to.

After several sleepless nights, Mr. Smith ______ a perfect solution to the problems.