阅读理解。 Dear Sir, I'm writing to complain about the service offered by your company. I told your service department on November 21 that my washing machine needed repairing, Your service engineers have since been here four times-on December 1l, December 19, December 25 and January 5. The problem was found out on the first visit and the wrong parts were brought by different engineers on the two next visits. The correct part was fitted by the first engineer on the fourth visit. In short, my complaints are: a. I had to wait three weeks for an engineer to call and nearly two months for the machine to be repaired. b. The engineers who called on December 19 and December 25 had been given wrong information by the company, which made me take two half days off unnecessarily. c. The first and fourth visits lasted a total of thirty minutes. But in the invoice (发票), I have to pay for four visits of four hours' work. I will not be paying the invoice for their mistakes and I do hope to receive your answers to these complaints. Yours, Robert White 1. Robert's main purpose in writing to the company is to tell the company _____. [     ] A. how its service department is operating B. how its different engineers came for the repair C. that two of the engineers didn't give him any help D. that he refuses to pay the company for their mistakes 2. The first of Robert's complaints is that _____. [     ] A. it took him three weeks to have the machine repaired B. it took him nearly sixty days to get his machine repaired C. it had been almost two months before the first engineer came D. it took the engineer 3 weeks to find out something wrong with the machine. 3. The second and third engineers brought the wrong parts because _____. [     ] A. the company didn't tell them exactly what they should do B. the company didn't tell them where the correct parts were C. they were not sure about whether the machine worked or not D. they hadn't been told where the right parts should be fitted. 4. It can be inferred from the letter that Robert promises to pay for _____. [     ] A. there hours' work B. half an hour's work C. an hour's work D. four hours' work