Mike along with his mother _______ to blame for the mistakes they had made.
A. is B. was C. are D were
These changes may cost quite a lot, _____ they will save us money in the long run.
| A．so | B．and | C．for | D．but |
The couple had quarreled all time before they their engagement
| A．broke down | B．broke through | C．broke off | D．broke out |
I am sorry I can’t spare any paper for you, for, you see, I have _____ myself.
| A．none | B．on one | C．neither | D．nothing |
Obama was elected ____ first black president of the United States four years ago and has been elected _____ president again for the next four years.
| A．the; the | B．the; X | C．X; the | D．a; a |
Can you tell the _____ difference between the words “require” and “ request”? I sometimes get puzzled by their meanings.
| A．dramatic | B．regional | C．apparent | D．subtle |