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【单选题】
用纸片法测试一次性饭盒的大肠杆菌群，()为及格。A.
<3个/100cm
B.
<3个/50cm
C.
<2个/100cm
D.
不得检出
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举一反三
【单选题】Jim is ____ honest boy and he is _____ university student.
A.
an; a;
B.
a; an;
C.
an; an;
D.
a; a;
【单选题】Jim is____ honest boy. We won’t play _____chess with him any more.
A.
an, the
B.
a, /
C.
a, the
D.
an, /
【单选题】—It's time for us _____ home. —Let's _____. [ ]
A.
go ; go
B.
to go; go
C.
go; to go
D.
to go; to go
【单选题】Jim is honest boy in my class. He bought me _____ useful book as abirthday present.
A.
a, an
B.
an, a
C.
a, a
D.
an, an
【单选题】—It's time for us home. —Let's . [ ]
A.
go / go
B.
to go / go
C.
go / to go
D.
to go to / to go
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