[ Perfect Tenses of Verbs ]
They have crossed the river.
A. present perfect
B. past perfect
C. future perfect

Random Topics:
DEGREE COMPARISONVerbs & AdverbsFuture Continuous TenseWord FormationPerfect TenseReported Speech and Reported QuestionsPresent/Past/Future Continuous TensePassive Voice Present SimpleSimple vs Continuous Past TenseSentence Structure and Pronoun AntecedentOther quiz:
Modal Verbs › ViewI regret that I . . . . . . take care of my parents when they were alive.
A. will not
B. would not
C. can’t
D. couldn’t
Grammar › View
I decided to … the top of the mountain this Saturday.
A. climb
B. climbed
C. climbing