There was a tall boy sitting in front of me, blocking my _____ completely.

26．Nowadays people have to pass various tests for professional __________ so that they can be qualified for a well-paid job.

—How can I use this washing machine?—Well, just refer to the _______.

It takes time to build ______ when you are learning a difficult skill.

 — Do you have any plans for this holiday?— To tell you the truth, I have nothing in        for holiday.