There is _____ book in my backpack．______ book is very heavy．（　　）

A．a； TheB．a； AC．the； AD．the； The

People usually touch something with their _______（　　）

A．eyesB．nosesC．mouthsD．fingers

Is that blue pencil case _______？（　　）

A．youB．yourC．yoursD．yourself

We ______ have a picnic together with our teachers next Thursday．（　　）

A．are goingB．are going to

C．will goingD．may going to

﹣Excuse me，is this the right way to the Children's Palace？

﹣Sorry，I'm not sure．But it _____ be．（　　）

A．mustn'tB．mightC．can'tD．must