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【单选题】
【C7】A.
effort
B.
response
C.
accident
D.
attempt
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皮皮学刷刷变学霸
举一反三
【单选题】I regret _______ that I can’t accept your gift
A.
S aying
B.
to say
C.
T el l
D.
T elling
【单选题】革兰染色的步骤正确的是
A.
结晶紫，碘液，95%乙醇，稀释复红
B.
结晶紫，稀释复红，碘液，95%乙醇
C.
结晶紫，95%乙醇，碘液，稀释复红
D.
碘液，结晶紫，95%乙醇，稀释复红
E.
稀释复红，碘液，结晶紫，95%乙醇
【单选题】I regret _______ you all present that only one job will be offered in the department.
A.
telling
B.
to tell
C.
to have told
D.
being told
【单选题】—I regret to say that I failed to rank first in the terminal exam. —Come on，nobody ________ win all the time.
A.
should
B.
must
C.
shall
D.
can
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