[ Grammar ]
when our headmaster _______ the door,he _____ a snake is behind the door
A. opened,saw
B. open,saw
C. opening,saw
D. has opened,see

Random Topics:
Pre-intermediateAdverbs of How Something is DoneNoun ClauseHas Got & Have GotCan/CouldSynonym and AntonymSubject Verb Agreement and Verb TensesWish SentencesTenses and QuestionsSpeech TensesOther quiz:
Vocabulary › ViewTo offer for approval.
A. ratify
B. veto
C. appeal
D. submit
Grammar › View
I _____ leave before 8.30 or I’ll be late for school.
A. must
B. mustn’t
Grammar › ViewIf I had more time, I ________ do more exercise
A. want to
B. would
C. will
Grammar › View
At what age did you learn _____?
A. to drive
B. driving