expressed vs. impressed

[Notorious F]

English Error, Elementary Level

ESL/EFL Test #20 "The interview", question 5

Q. All right we'll come to the matter of money in a minute but first I can say we are very expressed by the number of posts you have held.

(a) we'll
(b) first
(c) expressed

English Error, Elementary Level

ESL/EFL Test #20 "The interview", answer 5

Q. All right we'll come to the matter of money in a minute but first I can say we are very impressed by the number of posts you have held.

Correct entry: impressed
The error was: (c) expressed
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I want the explanation about this!

[lost_soul]

He managed to have held so many posts that they were astonished/surprized (in a positive way) at the fact.
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Alex

How much upchuck would a woodchuck upchuck if a woodchuck could upchuck ?

(a guy from Russia)