Find the mistake among the underlined words/phrases in the sentence. 1. If I were you, I will go to the dentist’s and have the tooth checked A. the dentist’s B. will go C. were D. checked 2. What you would do if you could speak foreign language well? A. What B. you would do C. well D. could 3. This class is only for people who’s first language is not English. A. is not B. for C. is D. who’s 4. The flight attendant whom served us yesterday was polite and friendly A. was B. The C. friendly D. whom 5. My sister has two children, who their names are Alibaba and Tal Mal A. who their B. are C. has D. My