Question

单项选择，从每小题A、B、C、D中选出一个能填入句中空白处的最佳答案。 （请说明选择理由）

1. My sister _________.
A. is good at singing　 B. is well in singing
C. is good at sing　 D. do well in singing
2. My parents told us they were _________.
A. keep healthy　 B. in good health
C. in good healthy　 D. did exercise
3. Our head teacher said we did _________than Class 1.
A. good B. well C. better D. hard-working

Answer 1

1.A(sb. be good at doing sth.某人擅长做某事)
2.B(sb. be in good health某人身体健康 )
3.C(后面有than,所以要用比较级better,其他三个都不是比较级)

Answer 2

ABC