Tìm lỗi sai

it is normal for student to be nervous when they were preparing for a new school year
tidal waves are the result of an abrupt shift in the under water moving ofthe earth
I thouht I recognized the assistant which served us
the twentieth century was a time when there was a lot of importants events
tom has got the job . you must congratulate him for his success

tìm lỗi sai