Răspuns:
1. There is a glass on the table. (We write "are" only when it is at plural)
2. I have got a toothbrush in the bathroom. (As the subject of a sentence or clause, a personal pronoun can be in the first person (I, we), the second person (you), or the third person(he, she, it, they).)
3. Jack and Jill are playing tennis. (Past Continuous Tense)
4. Does your friend know English? (The verb knows is incorrect with the helping verb "Does".)
5. My sister is a nice girl. (Misplaced word)
