[ Grammar ]
It is always interesting ——- people in airports while you’re waiting for a flight
A. being observed
B. observe
C. to have observed
D. to observe

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Parts of Speech and GrammarGRAMMAR - Could / Could notSentence StructurePresent TenseTenseModals of Necessity and SuggestionPresent Perfect SimpleGender and GrammarGrammar and StructurePronouns ( Interrogative )Other quiz:
Grammar › ViewOur stepdad…….(not see) his children a lot.
A. does not see
B. do not see
C. doesn see
D. don’t sees
Grammar › View
Heba admitted ……………my pen without asking me. (2014)
A. borrow
B. borrowing
C. borrows
D. borrowed
Vocabulary › Viewstretched or pulled tight; not loose or slack
A. artillery
B. taut
C. plunge
D. fray
Grammar › View
The cleaner ………… the floor every week.
A. sweeps
B. is sweeping
C. sweep
