“Isn’t it about time you _____ to do morning exercises？” “Yes, it is. Would you like to join us？”
A. begin B. have begun
C. began D. had begun
“Isn’t it about time you _____ to do morning exercises？” “Yes, it is. Would you like to join us？”
A. begin B. have begun
C. began D. had begun
C
选C.It’s time… / It’s high time… / It’s about time… 等后接从句时，从句谓语通常用过去式。