Nothing ______ stop us from ______ this plan.
---How did you find your visit to the Summer Palace yesterday?---______. I got separated from my 80-year-old grandparents.
______ in his novel, he didn’t notice his teacher entered the classroom.
It took me quite a while to ______ how to solve this problem.
The Smiths consider ______ a computer, which is commonly considered ______ a great help in our work and study.
He is not a hard-working boy. But ______ intelligence, he is much better than anyone else in the whole class.