Răspuns:
1. visit
2. are
3. don't understand
4. are spending
5. are becoming
6. Do people drop
7. is studying
8. think
9. flows
10. is increasing
Explicație:
1. Present Simple is used for laws of nature, general truths, actions that are part of our routine etc. (eg1: He goes to school every day. ; eg2: He usually goes to school by bus). For present simple we use the adverbs of frequency (always, usually, often...), every day/week..., once/twice/three times... a day/week/month... etc.
2. Present Continuous is used for actions happening at the moment (for eg: Matthew is watching TV right now.) For present continuous we use right now, at the moment, now, for now, next week/month/year etc.
