[ Grammar ]
In the early days, two distinct schools of ______________ in technology influenced different researchers and the course of their investigation.
A. brought
B. caught
C. thought
D. bought

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Grammar › ViewIt is _______ that all the students in class 10A choose to do a project on “Helping the needy”.
A. surprising
B. surprised
C. surprise
D. surprisingly
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I have a headache. We ____ go to a concert tonight.
A. should
B. shouldn’t
