[ Tenses ]
They were watching television when suddenly someone ______ at the door.
A. knocks
B. have knocked
C. was knocking
D. knocked

Random Topics:
Relative Clauses and etcGerunds and ModalsPast Simple VS Used toSentences Function and StructureVerb Forms and PrepositionsTenses and Figurative LanguagePre-intermediatePresent Simple and Present ContinuousAdverbs and Time ExpressionsCommunicative GrammarOther quiz:
Grammar › ViewI last spoke to my old friend on the phone three days ago.
A. I am speaking to my old friend on the phone in three days.
B. I haven’t spoken to my old friend on the phone for three days.
C. I will speak to my old friend on the phone three days later.
D. I spoke to my old friend on the phone last night.
Passive Voice, Modals of Deduction and First Conditional › View
. If he doesn’t apologize, she ______ be angry.
A. would
B. will
C. might
D. should
Grammar › ViewShe _____ be at home, I saw her in the cinema.
A. might
B. doesn’t have to
C. can’t
D. needn’t
Mixed General Quiz › View
The Great Barrier Reef is a popular tourist destination ___ Australia.
a. from
b. at
c. in
