I really like the family photo____we took on my grandpa's 80th birthday．（ ）
A．whoB．thatC．whatD．whose
﹣You look smart today!
﹣_____（ ）
A．Not good．B．That's OK．
C．What a shame!D．Thank you．
Our city is cleaner than it______be．（ ）
A．is used toB．used toC．uses toD．is used
After two years' physical training， he was____and healthier．（ ）
A．weakerB．longerC．strongerD．shorter
The number"23，456" can be read as "_____"．（ ）
A．twenty﹣three thousand， four hundred and fifty﹣six
B．twenty﹣three thousand and four hundred fifty﹣six
C．two three thousand and four five six
D．two three thousand， four and five six