Fossils are the evidence of past life______in the rocks of the Earths crust.A．revealedB．pr

The days _______ you could travel without a passport are a thing of the past.A. in w

In mentioning "trilobite," the author is making which of the following points？A．Fossils ca

What is the significance of the newly discovered fossils？A．To provide new evidence of the

What evidence in the passage can show that Americans love museums？A．There are all kinds of

In the past few years the workers have______ a lot of suggestions, some of which are being

The horse and carriage is a thing of the past but love and marriage are still with us and