某同学为了使反应2HCl+2Ag 2AgCl+H2↑能进行,设计了如下图示的四个实验,你认为可行的方案是
All the dishes in this menu, ______ otherwise stated, will serve two to three people.
The children loved their day trip, and they enjoyed the horse ride ______.
Progress______ so far very good and we are sure that the work will be finished on time.
Charles was alone at home, with_______ looking after him.
It is often ______ that human beings are naturally equipped to speak.