It’s more than an hour that I _______here, and she still ________I wonder if there’s a problem of some kind.
A. have been waiting – hasn’t arrived
B. have waited – didn’t arrive
C. am waiting – isn’t arriving
D. wait – doesn’t arrive

Random Topics:
Present Perfect or Past Simple TenseFuture or PastNoun Clauses with THATBe going to / WillComparative & Superlative AdverbsPast SimpleAdjectives vs AdverbsShould and Shouldn'tDo not or Does notRelative Pronoun/AdverbsOther quiz:
Present Perfect Tense › ViewWe have _______ in this town for 10 years.
A. live
B. lived
C. living
D. lives
Grammar › View
What is the passive voice of the sentence: “I am teaching a class”?
A. A class is being taught by me.
B. I teach a class.
C. I have taught a class.
D. The class is taught by me.
Vocabulary › ViewWhat does the word stratification mean?
A. Felt or imagined through someone else’s experiences
B. Having elegance and beauty of movement
C. Greatest in status, authority, or power
D. A system or classification consisting of various layers
Vocabulary › View
made possible
A. scuttle
B. enabled
C. craft
D. compelled
