It was quite ___accident that I met him; he was homeless and ___rags at that time.
A. by; in B. on; in C. at; by D. in; in
You should pay a lot of attention to children’s ideas; sometimes they ___be really creative.
A. must B. can C. need D. should
He is very humorous, while his brother is rather serious. That is ___their difference lies.
A. why B. where C. how D. when
I can still recognize Mr. Johnson, who is standing by the door, even though he looks ___different now.
A. mostly B. slightly C. unlikely D. finally
It is only ___our power to carry out ( ִ��) 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
