Ⅰ.单项填空

1.Now teenagers are very busy with their schoolwork and they have 　　　time to do exercise. 

A.few　　　　　　　　B.little

C.a few                    D.a little

2.He didn’t go to school yesterday 　　　he was ill. 

A.because                 B.because of

C.if                          D.so

3.(2015湖北黄冈,30)―How often do you have a school trip this term?

―　　　.Since several accidents happened to some schools,all the school outdoor activities have been asked to stop. 

A.Always                 B.Hardly ever

C.Sometimes             D.Often