50（）

The chairman ______ a few seconds till he found proper ...

单项选择题The chairman ______ a few seconds till he found proper words to make his idea clearer.

______ , their use is impossible in many inland places....

单项选择题______ , their use is impossible in many inland places.

After smashing the Gang of Four, our country ______ to ...

单项选择题After smashing the Gang of Four, our country ______ to order out of chaos.