Explanation:
1 How long have you studied English?
2 What time does the concert start?
3 Where did she find her glasses?
4 Would you like a piece of chocolate cake?
:)
D.
All of these
So I don’t know
Scaly so.
1) manuscript
----
2) impromptu, extemporaneous, manuscript, memorized
-----
3) memorized
----
4) extemporaneous