Rudi broke his leg in the accident; therefore , he will have Amir to drive him to his work. Which of the underlined words is grammatically incorrect?

Yohana: Anti’s wedding dress is really beautiful. Mita: I heard that she had her sister design it. This implies that Anti’s sister______.

Jacob : I have difficulties in filling these tax forms. Liviana: Well, you__________.

The schoolmaster had the students__________ their lesson before the exam.

Mr. Dandi : How can you determine student’s ability in writing? Ms. Lynn : _____________ a 1500-word essay!

Mrs. Wijayanto : Now that my daughter is getting married, I’m getting nervous about planning the wedding party. Mrs. Prasetyo : _________________.