通常水20℃时的溶解氧约为（）

A.8mg/L

B.9mg/L

C.10mg/L

D.11mg/L

E.4mg/L

We have all become addicted to(对…上瘾) sugar, particularly in soft drinks. Today, sugar consumption is ______ it used to be.

A．many times that

B．many times what

C．that many times

D．many times as much