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【单选题】
复发性他溃疡的确切病因是( )A.
细菌感染
B.
病毒感染
C.
遗传因素
D.
尚不明确
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举一反三
【单选题】The man went to prison, but the two boys______with a warning.
A.
took off
B.
got off
C.
kept off
D.
set off
【单选题】从图2—1所示灰铸铁件上的不同部位切取l、2、3号标准拉力试棒。经测试后,三者的抗拉强度应符合( )。
A.
σ3＞σ2＞σl
B.
σ1＞σ2＞σ3
C.
σl＞σ2＜σ3
D.
σl＝σ2＝σ3
【单选题】They kept trying, and their efforts finally _______.
A.
make it
B.
paid off
C.
are made it
D.
are paid off
【简答题】请根据视频内容回答word文档中的问题。 C1 Pass 5 Celebrating St. Lucia's Day.mpg Celebrating St. Lucia's Day.docx
【单选题】Brian kept __ off the pizzas, so he lost the race. [ ]
A.
to fall
B.
fell
C.
falling
D.
fall
【单选题】He will stop showing off, if no notice _____ of him.
A.
is taken
B.
will be taken
C.
takes
D.
has taken
【单选题】He had something urgent to do , so he asked___. A.have a day off B.having a day off C.to have a day off D.to have a day away
A.
have a day off
B.
having a day off
C.
to have a day off
D.
to have a day away
相关题目：
【简答题】请根据视频内容回答word文档中的问题。 C1 Pass 5 Celebrating St. Lucia's Day.mpg Celebrating St. Lucia's Day.docx
参考解析：
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