Choose the sentence that best combines each pair of sentences.

Tri is committed to maintaining a healthy lifestyle. He avoids processed foods and prioritises nutritious meals.

Parents must pay attention to their children's diet.

Parents are not required to pay attention to their children's diet.

Paying attention to their children's diet may be necessary for parents.

It is optional for parents to pay attention to their children's diet.

The next time I go bowling will be in 6 years.

I won't go bowling for 6 years.

I haven't gone bowling for 6 years.

I went bowling for 6 years.

Vaccines are only given after recovering from diseases caused by viruses.

Vaccines are used as a cure for diseases caused by viruses.

Vaccines are ineffective against diseases caused by viruses.

Vaccines are necessary to prevent people from a disease caused by viruses.

If he leaves for Paris, you should call him immediately.

You'd better call him immediately as he possibly leaves for Paris.

You'd better call him immediately so that he possibly leaves for Paris.

You'd better call him immediately unless he possibly leaves for Paris.

Last night she worked very hard so as to finish the report on time.

Last night she worked very hard although he wanted to finish the report on time.

However hard she worked last night; she finished the report on time.

No matter how hard she worked last night, she finished the report on time.

Doing exercise regularly helps you stay healthy.

Doing exercise regularly help you stay healthy.

Do exercise regularly helps you stay healthy.

Doing exercise regularly helps you are stay healthy.