What our society is like is decided by____ everyone chooses to behave.( )
A.whereB.whenC.howD.why
My mother ________ in the kitchen when the rainstorm came.( )
A.was cookingB.is cooking
C.cooks
A 3﹣kilometer﹣long bridge ________ in our hometown three years ago.( )
A.has builtB.is builtC.was built
Diana used to _________ to work, but now she is used to ________ because the road is crowded and she wants to keep fit.( )
A.drive; walkB.drive; walking
C.driving; walk
I found ________difficult for me to finish the work on time.( )
A.thatB.itC.this
You can surf the Internet _________ you want to know more about the 2020 World Middle School Games.( )
A.ifB.althoughC.until