[ Grammar ]
Electron storage rings ___ in investigations of the structure of materials.
A. They are used
B. That are used
C. Used
D. Are used
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Pronouns, Sentence Structure, and Figurative LanguageGrammar-Verbs & Nouns Singular, Plural, GenderEnglish for TourismAdjectives and VocabularyPassive ModalsPhrasal VerbSecond Type ConditionalVerbs: Action, Linking, and HelpingPresent Simple QuestionsTime ConjunctionsOther quiz:
Tenses › ViewHe ___ he ___ lunch an hour before.
A. say / had
B. said / would have
C. says / shall have
D. said / had
E. said / had had
Tenses › View
Sophy … ten minutes ago.
A. have arrived
B. arrives
C. arrived
D. has arrived
Continuous Tenses › ViewWhich sentence best illustrates the use of the future continuous tense?
A. They were having dinner.
B. They are having dinner.
C. They will be having dinner.
D. They had dinner.
Gerund & Infinitives › View
It is important ____ people back right away
A. calling
B. to call