解答：选（D）until在否定句中，表示“直到……才”，“在……前”的意思。如：I did not go to bed until I finished my homework.直到完成作业我才上床睡觉。It is/ was not until…that…是强调句型。如：It was not until I finish my homework that I went to bed.直到完成作业我才上床睡觉。
60. Most of the people who are visiting Britain ___ about the food and the weather there.
A. are always to complain B. have always complained
C. always complain C. will always complain
解答：选（C）根据who are visiting和句意来判断，该句陈述的是一般的情况，所以应选用一般现在时态。
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