They _______ play football last Friday b_爱下问搜题

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问题选择题

They _______ play football last Friday because Simon forgot to bring his football here.[ ]

A. could

B. couldn't

C. can't

D. can

答案

答案：B

补全对话，情景问答

给下列的问句选择合适的答语。

( ) 1. Who are they?
( ) 2. How many people are there in your family?
( ) 3. What's your father?
( ) 4. Is he a driver?
( ) 5. What's your mother?

A. Five.
B. She's a teacher.
C. Yes, he is.
D. My parents, my brother and my sister.
E. He is a doctor.

解答题

的根，
（1）求m的值；
（2）先化简，再求代数式