_ some mammals came to live in the sea is now known.

A.To be given

B.Having been given

C.Having given

D.Giving

A.If Ishould know

B.If Iknow

C.Had Iknown

D.Were Ito know

A.Making up

B.Doing up

C.Putting up

D.Sizing up.

A.What alovely weather

B.What lovely weathers

C.What lovely weather

D.What lovely aweather

A.What do you want?

B.What can I do for you?

C.What do you like?

D.Do you want to buy something?

A.That's very kind of you. I'd love to.

B.How dare you invite me? I won't go.

C.Yeah,thanks anyway.

D.Whether I'll go or not is not your business,OK?

A. complain personally to the manager

B. threaten to take the matter to court

C. write a firm letter of complaint to the store of purchase

D. show some written proof of the purchase to the store

A. there is a simple way of finding out if someone is lying

B. from some ways people behave we can know they are lying

C. certain emotions are proof of lying

D. in some situations women are most likely to think businessmen are dishonest

A.compressed

B.shrank

C.dropped

D.decreased