Can someone please correct these Japanese exercises I found on the internet? [1]
(Exercise 1) Please change to Japanese sentences.

1A, Are you students ?
Anata-tachi wa gakusei desu ka.

B, Yes, we are students.
Hai, watashi-tachi wa gakusei desu.

2A, Are you a single ?
Anata wa dokushin desu ka.

B, Yes, I am a single.
Hai, watashi wa dokushin desu.

3A, Are you Chinese ?
Anata wa Chuugoku-jin desu ka.

B, No, I am not Chinese. I am Japanese..
Iie, watashi wa Chuugoku-jin dewaarimasen. Watashi wa Nihon-jin desu.

4A, Is he Mr. Suzuki ?
Kare wa Suzuki-san desu ka.

B, No, he is not Mr. Suzuki. He is Mr. Tanaka.
Iie, kare wa Suzuki-san dewaarimasen. Kare wa Tanaka-san.

Question

Can someone please correct these Japanese exercises I found on the internet? [1]
(Exercise 1) Please  change  to Japanese sentences.

1A, Are you students ?
Anata-tachi wa gakusei desu ka.

B, Yes, we are students.
Hai, watashi-tachi wa gakusei desu.

2A, Are you a  single ?
Anata wa dokushin desu ka.

B, Yes, I am a single.
Hai, watashi wa dokushin desu.

3A, Are you  Chinese ?
Anata wa Chuugoku-jin desu ka.

B, No, I am not Chinese. I am Japanese..
Iie, watashi wa Chuugoku-jin dewaarimasen. Watashi wa Nihon-jin desu.

4A, Is he Mr. Suzuki ?
Kare wa Suzuki-san desu ka.

B,  No, he is not Mr. Suzuki. He is Mr. Tanaka.
Iie, kare wa Suzuki-san dewaarimasen. Kare wa Tanaka-san.

Answer

Nearly perfect.

B, No, he is not Mr. Suzuki. He is Mr. Tanaka. 
Iie, kare wa Suzuki-san dewaarimasen. Kare wa Tanaka-san.
↓
Iie, kare wa Suzuki-san dewaarimasen. Kare wa Tanaka-san desu.

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