1 . During those days, we had no alternative but_______ (stay) at home due to scary epidemic. (所给词的适当形式填空)

2 . It is tiresome for children________________ (stay) at home for long with no persons around them. (所给词的适当形式填空)

3 . —I am really struck by your spoken English. You speak so fluently. Have you been abroad?
—Yes. I ______ in London for two years.

A．have stayed	B．stayed
C．had stayed	D．have been staying

4 . —Haven’t seen you for ages! Where have you been?
—I went to Ningxia and ____________there for one year, teaching as a volunteer.

A．stayed	B．have stayed
C．had stayed	D．am staying