[ Vocabulary ]
He then worked on peaceful applications of __________ that can substitute fossil fuel for a clean environment.
A. navigation
B. mantle
C. mutations
D. nuclear energy.
Random Topics:
Modals for Ability, Possibility and PermissionAuxiliary and Modal VerbsFirst Conditional & Future TensesModals and InversionPresent Simple and Past ContinuousTOEICVocabulary and IdiomsCountable - UncountablePast Tense, Recount Text, and Future TenseSuffixes and TensesOther quiz:
Vocabulary › ViewTo offer for approval.
A. ratify
B. veto
C. appeal
D. submit
Grammar › View
I _____ leave before 8.30 or I’ll be late for school.
A. must
B. mustn’t
Past Tense › ViewAfter she …………………………. her breakfast, she went to work.
A. was eating
B. had eaten
C. ate
Grammar › View
There are a lot of tickets left, so you__________pay for the tickets in advance.
A. mustn’t
B. won’t
C. should
D. don’t have to