The burglar ___________ to open the safe when the owner _____________ in.
A. was trying / came
B. tried / came
C. tried / was coming

Random Topics:
Types of PrepositionConditional TypesFuture Simple TensesRequest with Modal VerbsDescriptionsAdverbial Clause of ConcessionPresent Tense vs Past TensePunctuationGrammar - must & have toCorrelative Conjunction & Complex SentencesOther quiz:
Asking and Giving Opinion › ViewSiwon: Afterschool Herman feels very tired and he gets dizzy.
Sonia: I think___________ And if it’s not necessary he doesn’t leave the bed.
A. You must go to school.
B. You have to take him to the hospital.
C. He should lie down and have bed rest time.
D. She would take rest.
E. He can see the doctor now.
Past and Present Tenses › View
Fill in the blank with past perfect: “After they ___ (finish) dinner, they went for a walk.”
A. have finished
B. had finished
Present Tenses › ViewI….(wait)….for you since two o’clock.
A. has been waiting
B. waiting
C. have been waiting
D. am waiting
Grammar › View
They don’t know where the key is. That’s why they haven’t opened the door.
A. If they had known where the key was, they would open the door.
B. If they knew where the key was, they would have opened the door.
