选出错误项并改正（5%）

(     )____________ 1. Lucy forgot her homework at home yesterday.             

A         B    C       D

(     )____________ 2. The gravity on Mars is about third-eights of that on Earth.           

A      B        C         D

(     )____________ 3. My sister prefers to wear black to red.

A        B      C         D

(     )____________ 4. He was too tired that he couldn’t keep his eyes open.

A               B       C      D

(     )__________ 5. Since her mum is busy, Mary oughts to do more housework.

A             B         C        D