The scientist has made quite a few discoveries, ______ of great importance to the whole world.
If the computer is _______ good as you said, we shall consider ______ one.
The top leaders of the two countries are holding talks in a friendly ______.
We all hold such a point that _______ good knowledge of English is what is needed badly in ______ international trade today.
It was not until early in the morning ______ he woke up _______ he found _____ he lay asleep on the floor for a night.
_____ at the end of next month, the stadium is being built day and night by the construction workers.