已知:, 如果用丙烯与异戊二烯在该条件下反应,最多可以生成含六元环的化合物(不考虑立体异构)
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.