1 a: Frank CREATED his own website last month
b: Really? I DID NOT KNOW he had a computer
2 a: HAVE you ever BEEN to a second-hand shop?
b: Yes, last week actually.
3 a: HAVE you FOUND anything worth buying
b: Yes, a beautiful bag that ...
The correct answer is C. week is.
The reason why this is incorrect is because there has to be a comma between the words week and is. The clause 'who is visiting the US this week' is an appositive clause, which means that it has to be set off from the rest of the sentence using commas. Hope this helps!
The egg and pupa. Pupas emerge from the egg and live in the water until they grow up and are able to leave it.