3.The team is going out to hold a party tomorrow after it ______ the project.
A. completes
B. completed
C. will complete
D. will have completed
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4.The new employees had to go over the safety regulations several times ______ they understood them.
A. since
B. before
C. unless
D. when
5.By the end of next year, I ______ for the company for 10 years.
A. work
B. am working
C. had worked
D. will have worked
6.______ arriving at the meeting room, Tina discovered that she had left the sample products in her office.
A. By
B. Through
C. On
D. In
8.Miss Smith's assistant enjoys ______ for her although she treats him very strictly.
A. work
B. working
C. to work
D. worked