换热器的清洗方法有以下四种:__、__、__、__。
The British Way of Entertaining GuestsBritish people's attitude towards life is to relax and enjoy themselves (them) whenever they are free to do so. They __1__ (emphasis) a lot on being __2__ (depend) and having their own way even during a dinner or party. I found it quite __3__ (differ) from the Chinese way of entertaining people. At several parties I had been invited to in London, I observed that people ate whatever they liked and even could ask for their __4__ (favor) drinks or food. The host seldom asked people what they __5__ (prefer) or that they should eat more. It was the same for __6__ (dine). Guests were given things they asked for. If they said, "No, thank you" the first time they were __7__ (offer) something, they would never expect the host to repeat the request. Once I was invited to a dinner, I behaved in the Britain way. But it was __8__ (fun) that an English friend of mine had known some Chinese customs and insisted on my __9__ (eat) more even though I told them several times that I had been full. Actually I felt rather __10__ (touch).
More and more friends of the author are facing some seemingly insurmountable challenges in their lives.
A. Yes
B. No
C. Not Given
It is desperation that causes the author's friends to turn to him for advice.
A. Yes
B. No
C. Not Given