Choose the sentence with correct subject-verb agreement:
A. The group of tourists are exploring the city.
B. The group of tourists is exploring the city.
C. The group of tourists be exploring the city.
D. The group of tourists were exploring the city.
Select your answer:
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Conditional Sentences › ViewDoctors and nurses worked tirelessly to screen patients. The disease was kept under control.
A. If doctors and nurses hadn’t worked tirelessly to screen patients, the disease would have been controlled.
B. If it hadn’t been for the tireless efforts of doctors and nurses to screen patients, the disease wouldn’t have been controlled.
C. If doctors and nurses had worked tirelessly to screen patients, they would have kept the disease under control.
D. If doctors and nurses hadn’t worked tirelessly to screen patients, the disease could have been controlled.
Grammar › View
Which of the following sentences uses the present perfect tense correctly with a time expression?
A. He has worked here for five years.
B. She has gone to the store since three hours.
C. We have played football yesterday.
D. I have read the book two weeks ago.