问题
I don’t know ___________or not.—Neither do I. You may ask his teacher.
A:whether he is at school
B:he is at school
C:that he is at school
D:when he is at school;
B:he is at school
C:that he is at school
D:when he is at school;
正确答案是：
同类题型
She always watches her son ________ the road everymorning, or she will feel worried.
Personal computers were in use in China when Amy visited the country in twentieth century(世纪).
Excuse me. Is the museum open every day—_______. It’s only open from Monday to Friday.
Will you___________ and take this letter to the post office?