[ 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

Random Topics:
Parts of Speech and GrammarGRAMMAR - Could / Could notSentence StructurePresent TenseTenseModals of Necessity and SuggestionPresent Perfect SimpleGender and GrammarGrammar and StructurePronouns ( Interrogative )Other quiz:
Tenses › ViewThe students (___) with anxiety while doing their assignments last week.
A. struggle
B. struggled
C. are struggling
D. have struggled
Conditional Sentence › View
If we arrived at 10, we ______________Tyler’s presentation.
A. attend
B. would have attended
C. will attend
D. would attend
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
