It is on the afternoon of September 1st ______ I met her at the supermarket.A．whenB．whereC

Why is it warmer on the side of a hill than on the valley floor？A．Because warmer air lifts

In "I think it impossible for man to live on the Mars", "it" is the ______ of the sentence

There is only one kind of family on planet Earth today: it is the traditional extended

Which of the following is NOT the criticism made on the Segway？A．It moves too slowly.B．It

It is the firm belief of astronomers that there are living creatures on other planets. It

Pudong New Area is part of the city of Shanghai. It is located on the eastern side of Huan