HE/ SPEND HOURS/ TRY/ TRPAIR THE CLOCK/.A. HE SPENT HOURS TRY TO REPA...

Câu 19: He/ spend hours/ try/ trpair the clock/.A. He spent hours try to repair the clock.B. He spent hours trying to repair the clock.C. He spent hours trying repair the clock.D. He spent hours to try to repair the clock.