[ Grammar ]
_____ the demands of aerospace, medicine, and agriculture, aengineers, are creating exotic new metallic substances.
A. Meet
B. Being met are
C. To meet
D. They are meeting

Random Topics:
Inversion + Passive VoiceNoun PhrasesClauses of ReasonConjunctive AdverbPrepositions and TensesGrammar - used toPreposition of PlaceSimple Past/Past ProgressiveIF CLAUSEConditionals III - Mixed 1st, 2nd & 3rd ConditionalsOther quiz:
Gerunds and Infinitives › View___________ at night is really difficult
A. to study
B. to studying
C. studying
D. study
Modals › View
You have a lot of work tomorrow. You ……………. sleep late.
A. mustn’t
B. must
C. have to
D. don’t have to
Grammar › ViewShe puts the fruits __________ the basket.
A. in
B. under
C. on
D. into
The Simple Present Tense › View
They always ________________ in class.
A. talking
B. talk
C. talks
D. talked