It’s really a(n) that Tony, a child of only two, can play the piano so well.
| A．wonder | B．dream | C．preference | D．pleasure |
To be successful, you must be smart, confident, and, ______ honest.
| A．therefore | B．above all | C．however |
D．after all |
I get the bicycle for _____.My friend
gave it to me when she bought a new one.
| A．everything | B．something | C．nothing | D．anything |
It’s really difficult to ______ what he is trying to express.
| A．leave out | B．break out | C．put  out |
D．make out |
We all felt a sense of ______ when we saw so many overseas Chinese coming back safe and sound from Libya.
| A．security | B．relief | C．emergency | D．achievement |
Scientists say it may be five years ______ it is possible to test this medicine on human patients．
| A．since | B．until | C．before | D．when |