Nowadays, automobile manufacturers have industrial robots ______ human workers in factory operations.
A. replace
B. to replace
C. replacing
D. replaced

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Present, Past, Present Perfect and ComparativeIf/Unless - Conditional type 1Have to/Has toVerbal and Appositive PhrasesWishes & Reported SpeechGerund or to InfinitivePassive Voice and ModalsActive-Passive VoicesGrammar Pronoun and Singular Plural NounGrammar - to beOther quiz:
Adverbs and Adverbial Phrases › ViewThey go before the main verb but after the verb to be.
A. Adverbs of manner
B. Adverbs of frequency
C. Adverbs of time/place
D. Adverbs of degree
E. Comment adverbs
Vocabulary › View
The river was drying up from a shortage of rainwater.
What does the word shortage mean in this sentence?
A. someone who is tall.
B. plenty of
C. a lack of supply
D. having an extra amount
Comma › ViewChoose the sentence with the correct comma placement.
A. I am typing a letter and she is talking on the phone.
B. I am typing a letter and she is talking, on the phone.
C. I, am typing a letter and she, is talking on the phone.
D. I am typing a letter and, she is talking on the phone.
Family Vocabulary and Grammar › View
. My uncle ___ in an office every day.
A. works
B. work
C. worked
D. will work
