You’d better make a mark ______ you have any questions.
—Where did the accident __________?—It was at the post office near the hotel __________ the peace talk would be held.
Depend on us, nowhere else __________ a better service.
With a wave of his hand he __________ us that we can set off right away.
In many places of China, __________ bicycle is still __________ popular means of transportation.
—What is his speech about?—As he claims, communication is an effective way to __________ the generation gap between parents and children.