Who do you think will _______ since the president has resigned?
A．take over B．take up C．take in D．take off
--How was your weekend, Rose?
--Awful! This was the first time I ________ alone at home, bored to death.
A．had left B．had been left C．have been left D．have been leaving
Many citizens urged their government to take measures to _______ their carbon emission to reduce greenhouse effects.
A．cut off B．cut up C．cut out D．cut down
Obama made _______ history by being elected as ________ first black president of the US.
A．不填；the B．a; the C．a; a D．the; a
_______seems to have been a strong competition in China for school leavers to enter college or university.
A．It B．There C．Here D．That
It is these poisonous products ______can cause the symptom of the flu, such as the headache and aching muscles.
A．who B．that C．how D．what
