e of the Russian gas limit to Europe,attempts _______ to use botanical fuel as a source of power.

The man _____ bravely _____ the Japanese during the Anti-Japanese War.

One way to understand thousands of new words is to gain _____ good knowledge of basic word information.

If we become more _____ in predicting earthquakes, we’ll reduce loss. [ ]

The design of the modern architecture concentrates on usefulness _____ decoration.