— Did you regret having left your well-paid job? —Why should I? I _______ as much, but I enjoy my present one more.

—What were you doing when I phoned you last night?—I﹍﹍my painting and was starting to take a bath.

Yunnan ______from serious drought since 2009, so it’s our duty to save water every day.

—I’m going to attend your lecture at 9∶30 tomorrow morning.—I regret to tell you that. When you arrive, it will have ended and I ________ questions with my students.

Experts suggest that teenagers spend at least 30 minutes exercising, five times a week. Walking and riding your bike _____ , and ______.