When did you get to know each other ? —-It was in 2008___we spent summer vocation together

He began to take political science_____ only when he left school

The manager and general engineer _____ very strict _____ his employees and ____ his work as well

My best friend often shares things me and helps people trouble.

Jane, you’ve made such great efforts that you are ________ to pass the exam.– It is very kind of you to say so, Mr. Smith.