The clothes are _______big.
A:to
B:too
C:two
对于任意实数a,b,c,d,以下四个命题中
①ac2>bc2,则a>b;
②若a>b,c>d,则a+c>b+d;
③若a>b,c>d,则ac>bd;
④a>b,则1a>1b.
其中正确的有( )
— Sammy, do you like the grammar book?
—Oh, I love it very much because it is so practical.