[ Grammar ]
The robot manufacturer had his customers ___ their outdated robots.
A. exchange
B. exchanged
C. to exchange
D. exchanging
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Sentences Function and StructureIndependent ClausesSynonymArticles and QuantifiersTransitionsHave to / Do not have toPresent Simple and Present Continuous TensesSubject Verb Agreement & Subjunctive MoodModals and Adjectives (ed-ing)Social Media VocabularyOther quiz:
Tenses and Conclusions › ViewWhich of these sentences uses the present progressive tense to describe an action currently in progress?
A. The train will arrive at the station soon.
B. They are discussing the new project at this moment.
C. She discusses the project with her team often.
D. They will be discussing the new project later today.
Modal Verbs › View
We ________ take an umbrella. It looks like it will be rain.
A. could
B. should
C. will
D. would