1)What do you usually do ....... spring.
A.on B.by C.at D.in
2)There .... a lot of flowers at the festival.
A.are B.were C.was D.is
3)..... did they do yesterday.
A.What B.when C.where D.who
4)........ you going to Nha Trang next week?
A.Is B.are C.do D.did