Question

----Is he crazy about playing football? ----Oh,he____.But now he is busy with his lessons

B used to C used to be
答案为B 但老师说是C WHY
若为do问 那么答是不是用used to do

Answer 1

~^Flying^~ 11:27:08
hey
shirley 11:27:17
helloo ^^
~^Flying^~ 11:27:32
Is he crazy about playing football?
Oh,he____.But now he is busy with his lessons

~^Flying^~ 11:27:38
B used to C used to be

~^Flying^~ 11:27:47
which one should be selected?
shirley 11:27:48
??
~^Flying^~ 11:27:55
underline part
~^Flying^~ 11:28:08
Oh, he used to be? or he used to..
shirley 11:28:33
i think the correct answer is use to be
~^Flying^~ 11:29:52
oh,,if
Does he play football?
He used to do? or He used to?
shirley 11:30:07
he used to
~^Flying^~ 11:30:24
okay,I got it ,thangks

这是我跟一个老外的对话，你自己看看。。
应该选择 C,
如果是do he play football?
就要用he used to..
do可以省略

Answer 2

used to 指过去常常只是一个相当于频率的副词（不是谓语切记used to do 才是完整说法）～而C恰恰表示：他过去常常这样做～前一个不完整缺少谓语～～

Answer 3

C的回答完整，B一般没这个说法，有点残缺

Answer 4

C