We ________ our report yet, so we can't submit it today. A. didn't finish B. hadn't finished C. don't finish D. haven't finished

She is working on her presentation for next week's conference. What does "work on" mean? A. Borrowing something B. Destroying something C. Improving something D. Hiding something

She ________ in Hanoi for five years before moving to Ho Chi Minh City." A. has lived B. was living C. lived D. had lived

Everyone can __________ to protecting the environment by recycling. A. manage B. lead C. contribute D. support

They were tired because they ________ all day. A. worked B. had worked C. have worked D. work

I ________ my assignment, so I can relax now. A. have finished B. finished C. finish D. had finished

The internship gave me ________ experience that helped me find a job later. A. valuable B. grateful C. positive D. likely

Scientists often work together on projects. This _____ helps them succeed. A. collaboration B. effort C. invention D. device

I realized I ________ my phone at home when I got to class." A. have left B. had left C. left D. was leaving

Yesterday, I finished my homework and _______ (go) to bed early.

By the time the teacher arrived, the students _____ the exercise. A. were finishing B. had finished C. have finished D. finished

We ________ each other since high school. A. have known B. knew C. know D. had known

Listening to upbeat music always puts me in a good __________. A. attitude B. mood C. collaboration D. well-being