皮皮学，免费搜题
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【单选题】
广度优先是()的一搜索方式A.
分支限界法
B.
动态规划法
C.
贪心法
D.
回溯法
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】一 Mary looks sad and disappointed —So you if you had failed the NMET.
A.
do
B.
did
C.
will
D.
would
【简答题】If they know we are in trouble, they will certainly come to
our help. ( 但是如果他们不知道呢 ?)
【单选题】If they _______ to make heart-felt apologies soon we will have to bring an action against them.
A.
disagreed
B.
refused
C.
agreed
D.
hoped
【单选题】——Mary stays alone in the classroom and looks sad. ——________ to her?
A.
What happens
B.
What is happened
C.
What is happening
D.
What was happening
【单选题】---Mary looks sad and disappointed ---So ____ you if you had failed the exam.
A.
do
B.
did
C.
will
D.
would
【单选题】---Mary looks sad. Did you tell her about the accident? ---Yes, but I __________ have told her.
A.
should
B.
shouldn't
C.
must
D.
ought to not
【单选题】---- Mary looks sad. What _________ her ? -----She failed in the maths exam.
A.
happened to
B.
happened
C.
was happened D were happened
【单选题】----- Mary looks sad . Did you tell her about the accident ? --- Yes , but I ______ her later .
A.
should have told
B.
shouldn't have told
C.
must have told
D.
ought not to have told
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