[ Infinitive and Gerund ]
It is quite difficult ____________ how they did that.
A. imagine
B. to imagine
C. imagining
Select your answer:
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Tenses › ViewOur class __ a new computer lab next month.
A. will get
B. gets
C. got
D. Getting
Infinitives or Gerunds › View
Sam often forgets ………………the door
A. locking
B. to lock