He started to learn English in 1990 and in the years ________ he kept on using it in his work.
Michael's new house is like a huge palace, __________ with his old one.
Sorry I'm so late, but you cannot imagine __________ great trouble I took to find your house.
She is __________ the newspapers to be thrown away and putting away the rest.
__________ young people are making efforts to take more exercise and eat healthily, they are still putting on weight.
__________ two giraffes (长颈鹿), Zheng He later brought zebras, shells, elephant ivory back to China after his voyages.