Marcus is our foreign teacher．He _______ in our school for two years．（ ）
A．wasB．will beC．has been
Look!The man _____ be Mr．Black．He's always standing there at this time every day．（ ）
A．mustB．can'tC．mustn't
Going hiking with a group of people makes me _________．（ ）
A．relaxingB．to relaxC．relax
How do you learn English？
_______ listening to tapes．（ ）
A．ByB．WithC．For
Tara and Tina are both smart，but Tina is _______ than Tara．（ ）
A．hard﹣working
B．more hard﹣working
C．the most hard﹣working