Some people think no one can be ______ to SARS.
A、free
B、rid
C、open
D、immune
第1题:
A.one…another
B.one…the other
C.one…the others
D.some…others
第2题:
Before replacing a piston you should check that all rings are ___.
A.free
B.fastened
C.broken
D.stuck
第3题:
第4题:
A、free
B、suitable
C、available
D、ready
第5题: