下列分子或离子中不能跟质子结合的是( )A、NH3 B、H2O C、Ca2+ D、NH4+
It is often ______ that human beings are naturally equipped to speak.
I’m sure that your letter will get______ attention. They know you’re waiting for the reply.
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.