Let’s not waste time ____ about this.
A.argue
B.arguing
C.having argued
D.to have argued

____ that I would be late for school, I took a taxi instead of a bus.
A.Thinking
B.Thought
C.To think
D.To be thinking

I insist on ____ this small present as a token of my appreciation.
A.your accepting
B.you to accept
C.yours accepting
D.you accept

(31) ____
A.dense-populated
B.densely-populated
C.dense-populating
D.densely-populating

A.solidarity
B.cooperation
C.voluntarily
D.economically

A.promote
B.enjoy
C.involve
D.realize

A.remember
B.understand
C.imagine
D.encourage

Paul _____come to the wedding. He's working that day.
A.can't
B.doesn't have
C.doesn't have to
D.mustn't

Thailand has dominated in most of the recent ASEAN GAMES in the region, winning the biggest numbers of gold medals.
A.has been the most successful
B.has been the least successful
C.has been the most dedicated
D.has been the least dynamic

It's a long time since he heard from his brother.
A.He hasn't heard to his brother for a long time.
B.He didn't hear from his brother for a long time.
C.He hasn't heard from his brother for a long time.
D.He has heard from his brother for a long time.