Jack often plays _____ piano and he wants to be a pianist when he grows up．（　　）

A．aB．anC．/D．the

Tomorrow is our teacher's birthday and we are going to give _____ a big surprise．（　　）

A．hisB．himC．heD．himself

More than two _____ trees are planted in our neighborhood every year．（　　）

A．hundredB．hundreds

C．hundreds ofD．hundred of

It's cold outside，Sandy．You'd better _____ your coat to keep warm．（　　）

A．put upB．put outC．put onD．put away

Excuse me，______ I take the magazine out of the reading room？

Sorry，you can't．Just here，please．（　　）

A．mustB．wouldC．mayD．need