Tìm lỗi sai

14. This is the class I have ever taken. (a) difficult (b) most difficult (c) more difficult(d ) as difficult as 15. Other documents are available upon (a) request (b) need (c) want (d) necessity 16. must be paid for what's going on here. (a). Looking (b) Presence (c) Attendance (d) Attention 17. Yesterday, I met a a woman grandfather was Swedish. (a) who (b) who's (c) whose (d). which 18. she nor he is right. (a) Both (b) Either (c) Each (d) Neither