单选题 8.Some scientists study the movement of the stars. （ ） 

单选题 5.In Britain, salad is usually made with lettuce and tomato.（ ） 

单选题 2.We have reached safely.（ ）  

单选题 7.My score on the test was 99. （ ）  

单选题 1.It made me very sad when I thought of his death。 

单选题 6.She changed her clothes behind a big screen .（）  

单选题 3.The moon sailed across the sky. （ ）  

单选题 4.The old sailor had worked on many ships.（ ）