These pairs of words are easily confunsed. Choose the best word for each sentence

These pairs of words are easily confunsed. Choose the best word for each sentence:
1. Mrs.Hang is our ___.   A. principle.           B.principal
2.Did you get good ____ for the oral test?       A. mark      B.degree
3.No student wants to ____ an exam.     A.lose         B.fail
4.We can do an ____ in a lab.     A.experience     B.experiment
5.Check your ____ to know how many subjects you have tomorrow!     A.timetable       B.schedule.
6.Maths is my ____ at school.     A.topic.   B. subject
7.I made many ____ in my test.      A.mistakes        B.faults.
8.Do write ____ ink when sitting an exam.    A.in           B.by
9.Teachers ask us to finish _____ before class.        A.housework.         B.homework.\
10.I was sick so I ___ three English classes last week.       A.lost            B.missed