All her energy ________ (集中在学习上) so she had no time for any recreation activities.

A．At the bank.
B．At the hospital.
C．At the hotel.
D．At the department store.

A．He would sing a specific slogan to attract the potential customers.
B．He would walk along the streets to inspect the quality of the coffee.
C．People can hardly find the "muuza kahawa" today.
D．He would carry coffee cups and beans in pockets and a brass coffee pot in his hand.