Помогите поставить предложения в отрицательную и вопросительную форму: Ann is a journalist. This student has a good memory. professor Smith and Professor Black are colleagues. They are economists. The secretary is in the ofice. Bill has qestions to the lecturer. lecture halls are on the second floor. The problem is difficult. We have lectures on Friday. A scientist in an expert in natural sciences. A scholar is an expert in the humanities.

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