The technical cooperation and cultural __________ between the two countries are daily on the increase.

Suddenly we felt the _________atmosphere grow tense as neither of the sides would give in.

Such men have made＿＿＿＿＿by developing oil businesses．

The old man got into the _____ of storing money under the bed. 

—Do you know what _____ influenza A (H1N1) has? —A high temperature, throat pain and so on.