Составьте по 2 предложения с каждым словосочетанием: you really ought to/should; i strongly advise you to; the best thing you can do is to; it's worth going/visiting.

2. You should go to Black Rock Beach, it’s just perfect place for windsurfing. 
3. I strongly advise you not to go swimming in Sunset beach; the water is really deep there. 
4. The best thing to do is to go to island, I recommend you doing it in September for it would be less crowded. 
5. It’s worth going to Cairo, there are so many thing to see.