It is high time we (give up) smoking.
give up
gave up
Correct
given up
should give up
Explanation:
Correct Answer is: gave up
– It is high time, it is time, wish, fancy ইত্যাদি থাকলে Verb এর past form হয়।
তাই সঠিক উত্তরটি হবে – It is high time we gave up smoking.
Source: Advanced Learner`s English Grammar & Composition by Chowdhury & Hossain.