国际经济和科技竞争越来越围绕人才知识的竞争展开。发展的优势蕴藏于知识和科技之中,社会财富日益向拥有知识和科技优势的国家和地区聚集,谁在知 识和科技创新上占优势,谁就在发展上占据主导地位。这种发展格局表明
﹣﹣﹣_________ your hands before dinner,Tony.
﹣﹣﹣No problem,Mom.( )
Wash
Washes
Washing
To wash
﹣﹣﹣Is Helen here?
﹣﹣﹣No,she isn't here.She_______ in half an hour.( )
arrives
arrived
will arrive
has arrived
This Saturday is my_______ birthday.( )
fourteen
fourteenth
forty
the fortieth
The price of this piano is a little ________ .I can't afford it.( )
cheap
expensive
low
high
﹣﹣﹣Excuse me,is this_______ car?
﹣﹣﹣No,it isn't.Mine is over there.( )
my
your
his
her