[ Grammar ]
I’m tired because I ___ since this morning.
A. work
B. have worked
C. worked
D. working
Select your answer:
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Basic Grammar › View_____ teachers do you have? I have 8 teachers.
A. How many
B. How much
C. How often
D. How old
Conjunctions › View
___ the teacher explained the lesson several times, the pupils still did not understand it.
A. Although
B. As
C. If