[ Modal Verbs of Certainty and Possibility ]
He could _____ late – it depends how long he has to work.
A. be
B. have been
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Grammar › View. Which sentence correctly uses “by + gerund”?
A. She lost weight by to exercise
B. She lost weight by exercising.
C. She lost weight by exercise.
D. She lost weight by exercises.
Grammar › View
It took Tina two hours ＿＿＿ her homework, but she still couldn’t finish it.
A. do
B. doing
C. did
D. to do