So far, MERS(中东呼吸综合症) has become one of ____ illnesses in the world.A. seriousB. more seriousC. the most serious
The Long River is one of ______in China.
– How does John get to school?– He______ his bike to the subway station, then he ______ the subway.
How______ is it from your house to the shop?
– Who arrived late for class this morning?– .
_____beautiful sheep they are !