603.We're looking forward to the holidays when we'll be travelling _____ camels ______ the Sahara Desert.
A.by;across
B.by;through
C.on;over
D.on;through
604.The weather in London is so changeable that people always take their umbrellas with them ____ rain.
A.for fear of
B.in need of
C.in spite of
D.because of