The room is in a terrible mess; it ___ cleaned.
A. shouldn’t have
B. can’t have been
C. mustn’t have
D. wouldn’t have been

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IELTS GrammarPresent Simple and Past ContinuousFood VocabularyNounsGrammar ElementaryNoun / PronounVocabulary, Grammar, SpellingWill and Going toParticiple - ing/ edPast and Present Continuous tenseOther quiz:
Grammar › ViewWhen there is a collective noun, the verb can be singular or plural, depending on whether the noun is referring to a group as a whole or to individual members of the group. What is the correct verb form to complete the sentence? The flock of birds (is/are) flying south.
A. Is
B. Are
C. Was
D. Were
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Can you go to the shop? We need some _____ .
A. potatos
B. potatoes
C. potato
Grammar › ViewThe expression of thanking …
A. Many thanks.
B. I am very sorry.
C. See you later.
D. How are you doing?
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The teacher insists _______homework regularly.
A. that the student do
B. that the student does
C. the student to do
D. that the student is doing
