sentence help

Hi. Can anyone check answers on these sentences... ?

1) The price of houses has risen (rise) dramatically in recent years.
2) These are the glasses I have worn (wear) ever since I was 30.
3) Few of the trees in our village 's survived (survive) the storms during the winter of 1991.
4) This have been (be) his home for over 20 years and he doesn’t want to leave it.
5) We were staying (stay) with Mike and Sue last weekend.
6) I last saw (see) you in London two years ago.
7) I never used to see (see) anyone play so well in my whole life.
8) John Grigg have discovered (discover) the comet now called Grigg-Skjellerup, at the beginning of the 20th century.
9) When I was having (have) breakfast, the phone suddenly rang.
10) The adult human body contained (contain) 206 bones.
11) _______________ (where, she, buy) that beautiful dress?