1) You (　　　) swimming for an hour. How about taking a short rest?

• were
• have
• have been

2) My grandfather (　　　) a novel since last summer.

• wrote
• has been writing
• was writing

3) We (　　　) each other for more than ten years.

• knew
• have known
• have been knowing

4) What (　　　) when Saori called you last night?

• are you doing
• were you doing
• have you been doing

5) Cathy (　　　) in New York before I came to know her.　come to ～「～するようになる」

• lives
• has lived
• had lived

6) I (　　　) to Aomori three times before I went there on a school trip.

• go
• has been
• had been

7) When we arrived at the hall, the concert (　　　).

• had already started
• has already started
• already started

8) I feel sick now because I (　　　) too much this morning.

• ate
• have been eating
• had eaten

9) I soon made friends with the boy because I (　　　) to him once.

• had talked
• have talked
• have been talking

10) I didn't watch the movie on TV last night because I (watch) it before.