He started to learn English in 1990 and in the years ________ he kept on using it in his work.
You should pay a lot of attention to children’s ideas; sometimes they ___be really creative.
He is very humorous, while his brother is rather serious. That is ___their difference lies.
I can still recognize Mr. Johnson, who is standing by the door, even though he looks ___different now.
It is only ___our power to carry out ( 执行) the rules, rather than make them. A. within B. on C without D. off
. At first his plan seemed impossible to put into practice, but ___it turned out to be quite easy. A. ever since B. so far C before long D. above all