1 . The capital city London is a ancient port city that has a history _______ (date) back to Roman times. (所给词的适当形式填空)

2 . They have to have a ________(base)understanding of computers in order to use the advanced technology.(所给词的适当形式填空)

3 . He talked with his parents without ________（refer）to the fact that he had registered for an institute.（所给词的适当形式填空）

4 . However, a pocket dictionary doesn’t contain enough entries to be adequate for college ________(refer) homework. (所给词的适当形式填空)

5 . The classroom is a place ________ teachers and students can interact. （用适当的词填空）

6 . I’d like to know the reason _________you’re so late. (用适当的词填空)

7 . Give your brother my_______ (regard) when you see him. （所给词的适当形式填空）

8 . Environmental pollution is regarded as a ________ (globe) phenomenon. (所给词的适当形式填空)

9 . White has always been ________ symbol of purity in Western cultures. （用适当的词填空）

10 . Everyone of us was created___________ （equality）, and we are the God in our own world. （所给词的适当形式填空）