根据人教版九年级英语Unit12 I used to be afraid of the dark，判断正（T）误（F）。

( )1. Wang Kun is having a great time in French.

(     )2. You are supposed to put your bread on the plate not on the table.

( )3. You can eat bread with your hands.

( )4. You should keep your hands, not the elbow, on the table.

集料中若含有无定形( )等活性物质，当混凝土中有水分存在时，它能与水泥中的碱起反应，产生碱集料反应，使混凝土发生破坏。

A．CO₂

B．SIO₂

C．K₂O

D．Na₂O