________evidence that language acquiring ability must be stimulated.

The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.

My train arrive in New York at eight o'clock tonight. The plane I would like to take from there ______by then.

Many workers were organized to clear away remained of the World Trade Center.

The organization broke no rules, but ______had it acted responsibly.

A survey was carried out on the death rate of those who were infected by SARS, ________were surprising.

In recent years much more emphasis has been put______ developing the students productive skills.

_____ of water makes Death Valley a desert, but it is by no means devoid.

There are some police cars in front. What do you suppose _____?

Tina _____ have known the truth, or she would have told us.