please help 1. Last summer I saw people who ... in a beach house by the sea.
a) stay b) stayed c) have stayed d) staying
2. Farmers usually ... in a farm house.
a) live b) lived c) have lived d) living
3. Once I... riding a camel in the Gobi.
a) try b) tried c) have tried d) trying
4. City transport ... since the 90s.
a) never change b) never changed c) never changing d) has never changed 5. Recently the underground transport... more efficient.
a) become b) became c) has become d) becoming
6. Street traflie... much better in the future.
a) be b) was c) has been d) will be
7. Airports always ... to me a busy place.
a) seem b) seemed c) have seemed​