地壳中含量最多的非金属元素和金属元素组成的化合物是什么?
She’slostalmost________________friendshehad.
Intheoriginaltest，alltheanimalsinatestgrouparegivenasubstance_______halfofthemdie
Thedelegation________RussiawillvisitLondonthisafternoon.
Manisa“victimofforcesoverwhichhehasnocontrol.”Thisisanotionheldstronglyby().
Themoneywouldhavetoberaisedby________taxation.