Choose A, B, C, or D to indicate the sentence that is combined from two sentences.

He answers all questions about President Ho Chi Minh. No one can do that.

When coming to the site, visitors can enjoy mountain climbing but have no chance to explore the caves and grottos.

As there are too many visitors, the site only offers exploring caves and grottos not mountain climbing.

When coming to the site, in addition to exploring the caves and grottos, visitors can also enjoy mountain climbing.

When coming to the site, visitors can neither enjoy mountain climbing nor explore the caves and grottos.

It's a long trip to the world heritage site, but we have to start off early and come back in the afternoon.

It's a long trip to the world heritage site because we have to start off early and come back in the afternoon.

It's a long trip to the world heritage site, so we have to start off early and come back in the afternoon.

It's a long trip to the world heritage site if we have to start off early and come back in the afternoon.

My friends chose a trip to Trang An Landscape Complex to travel on a boat.

Travelling on a boat, my friends chose a trip to Trang An Landscape Complex.

My friends chose a trip to Trang An Landscape Complex, but they couldn't travel on a boat.

My friends could travel on a boat if they didn't choose a trip to Trang An Landscape Complex.

Having visited the heritage site before, Victor fell in love with the scenery there.

Having fallen in love with the scenery of the heritage site, Victor visited the place many times.

Despite falling in love with the scenery of the heritage site, Victor visited the place again.

Had Victor visited the heritage site before, he would have fallen in love with the scenery there.

The local authority can help a photo competition on cultural heritage more quickly.

The local authority can spread the information about a photo competition more quickly by cultural heritage.

The local authority can organize a photo competition to spread the information on cultural heritage more quickly.

The local authority will organize a photo competition if they help spread the information on cultural heritage more quickly.

He objected to removing relics from the heritage site.

He denied having removed the relics from the heritage site.

He accepted to remove relics from the heritage site.

He advised against removing relics from the heritage site.

We have never visited this wonderful place because of the cultural heritage site.

If we had more time, we would visit such a wonderful cultural heritage site.

It's the first time for us to visit such a wonderful cultural heritage site.

We will never visit such a cultural heritage site.