david has taken a boat tour to enjoy the beautiful landspace of Ha long bay last summer.

(a)  

when you have any difficulties, identify the problems and come along with as many solutions as possible.

(a)  

They are interested at exploring different cultures during their travels.

(a)  

Having study the brochure carefully , my brother decided to apply for the hotel management course.

(a)  

Had finished the project, he decided to take a break.

(a)  

you should learn some necessary skills to achieve dependence for the future.

(a)  

This meeting of world leaders was a truly historical event that is likely to be remembered in the future.

(a)  

I built up my muscles since I started working out.

(a)  

My grandfather done regular exercise since he was young

(a)  

She was able to come up to a great idea for the project.

(a)  

That man has taken over responsibility from this project.

(a)  

Nam regretted not having took the university entrance exam.

(a)  

Not have spent enough time on studying. He didn't pass the exam.

(a)  

Becoming dependent is important for teenagers, especially when they leave school.

(a)  

A lot of money was raised online to restoration the old city centre.

(a)  

Student can get into university if they earned high grades or pass the university entrance exam.

(a)  

My brother wasn't offered the job because he don't have the right qualifications.

(a)  

Preserving their heritage can present a challenging to many nations, especially if they have a large number of heritage sites.

(a)  

The authorities hope harsher punish will stop people from damaging cultural sites.

(a)  

Made the wrong decision , Jackson lost his interest in studying the subject.

(a)  

He denied have posted negative comments about the school on social media.

(a)  

Quan Ho is a style of Vietnamese folk music that was recignised by UNESCO as a World Natural Heritage in 2009.

(a)  

Good communication skills involve identufying the problem , and then coming up with as many solutions as possible.

(a)