Jawaban:

1) [+] She is studying Math.

[-] She is not studying Math.

[?] Is she studying Math?

2) [+] They are working in the post office.

[-] They are not working in the post office.

[?] Are they working in the post office?

3) [+] I am helping my mother in the kitchen.

[-] I am not helping my mother in the kitchen.

[?] Are you helping your mother in the kitchen?

4) [+] We are buying some vegetables.

[-] We are not buying some vegetables.

[?] Are you buying some vegetables?

5) [+] He is practicing English test.

[-] He is not practicing English test.

[?] Is he practicing English test?

Semoga membantu!