"Among the (most complex) crystals are (that) of silicon dixide, which has seven (different) structures at various temperatures and pressures,the most (common being) quartz. "
Many doubtful points here.
The answer is B. So, I suspect that ' that ' should be 'those' (which is referring to 'crystals') according to the answer. But another question comes up if the point above is right. Do you notice that behind 'which' we have a 'has' in italic type? Does it mean the relative pronoun 'which' refers to 'silicon dixide' (which is in singular form), then 'has' is its subordinating verb?
Additionally, what is 'common being'? These two words can work together? I never heard it before.
Thank you!!
Top answer
You got it! "that" should be "those". It's "has", not "have", because the antecedent of "which" is "silicon dioxide", not "crystals".
— CalifJim
You got it!
"that" should be "those".
It's "has", not "have", because the antecedent of "which" is "silicon dioxide", not "crystals".
"They offer several flavors of ice-cream.
" (is >> being) "...
Free · every Monday
Get the Weekly English Kit 📬
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
You got it! "that" should be "those". It's "has", not "have", because the antecedent of "which" is "silicon dioxide", not "crystals".
"They offer several flavors of ice-cream. The most popular of these flavors is vanilla." = "They offer several flavors of ice-cream, the most popular being vanilla." (is >> being)