The Nuclear Security Summit is an initiative of Mr. Obama, considers nuclear terrorism to be one of the greatest threats to international security．
| A．which | B．what | C．who | D．Whom |
The meeting lasted till late ______.
| A．into night | B．at night | C．into the night | D．at the night |
Li Pin is the ______ man I want to see.
| A．last | B．laster | C．latest | D．latter |
It is ______ for anyone to choose good friends.
| A．the most important | B．too important thing | C．a most important | D．most important |
I cannot thank you ______ much of your kindness. I owe my success to you.
| A．so | B．very | C．too | D．as |
Which do you think is ______, wealth or health?
| A．better | B．the better | C．best | D．the best |