21. I think I’ve lost my pen. I’ve ________ it everywhere but 1 can't find it

A. looked for

B. looked in

C.  looked on

D. looked at

22. Mary: "You look great in this new dress!" - Daisy: " ________.'

A. With pleasure

C. I’m glad you like it

B. Not at all

D. Don't say anything about it

23. We are saving money ________ we want to buy a new house.

A. so      

B. because

C. if

D. although