[ Grammar ]
They clean the tank at the aquarium, but they ……………… do it every day!
A. don’t have to
B. mustn’t

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Grammar - to beModal PossibilitiesPresent Perfect Simple vs ContinuousGrammar - First ConditionalConditional Type 1Conditionals Type IZero and First ConditionalsPast Simple vs Past ContinuousPresent Simple with Adverbs of FrequencyAdjectives and ArticlesOther quiz:
Grammar › ViewChoose the correct preposition to complete the sentence.
We are very excited __________________ our trip to Spain next week.
A. at
B. with
C. about
D. over
Present Perfect Tense › View
Thousand of whales … (migrate) to give births.
A. migrated
B. are migrated
C. have migrated
D. has migrated
Vocabulary and Grammar › ViewHe will finish his homework if he stars doing it now.
A. TRUE
B. FALSE
Grammar › View
Today’s celebration of Valentine’s Day ___ of a tradition that began in the Roman Empire.
a. grew out
b. grew up
c. grew
d. grown up
