[ FOR & SINCE ]
I have been waiting _______ 4 o’clock.
A. since
B. for

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Modals › ViewYou forgot to lock the door. You ____ after you left
A. should check
B. should have checked
C. should be checking
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Miss Lee has many dresses. ………. are all very pretty.
A. We
B. They
C. I
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A. write
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Sam and Kevin are running ________ the park.
A. on
B. in
C. under
