[ Tenses ]
They (not visit) their grandparents last summer.
A. They did not visit their grandparents last summer.
B. They have not visited their grandparents last summer.

Random Topics:
So, Such, Many, MuchTake or PutVerb PatternsVerbs with Prepositions and ConjunctionsContinuous TensesQuantifiers & Modals of ObligationContractions and ConjunctionsModal VerbPrepositions of Time & PlaceComparison DegreeOther quiz:
Tenses › ViewForm a sentence in simple present tense using the verb ‘swim’.
A. She swims in the pool every morning.
B. They swims in the pool every morning.
C. I swim in the pool every morning.
D. He swim in the pool every morning.
Tenses › View
She always (have) a music lesson on Friday.
A. have
B. has
C. is having
D. will have
Grammar › ViewI have to attend tuition class _____ 5.30pm.
A. in
B. on
C. at
Grammar › View
Oil is a uncountable noun.
A. TRUE
B. FALSE
