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【单选题】
主要由巨噬细胞产生的细胞因子是( )A.
IL-1
B.
IL-2
C.
IL-4
D.
IFN-γ
E.
TNF
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反馈参考答案：
举一反三
【简答题】改错。 ( ) 1. Whatever finishes first wins . A B C ( ) 2. When we arrived at the airport, our flight has already left. A B C ( ) 3. E...
【简答题】1. Complete the following sentences using the passive voice. 1.
The results __________ (take) from the survey (调查). 2. The mail ___________ (deliver) at about 10:00 a.m. every
day. 3. When we arrived...
【单选题】When we arrived at the airport, the plane _______. A). already took off B). took off already C). had already taken off D). has already taken off
A.
1
B.
2
C.
3
D.
4
【简答题】As a teacher . I often make it a rule that when we are on a field trip , there will be no talking as we enter a building . This rule 1 to entering any place , whether it is a cinema , a church , a the...
【单选题】When we arrived at the airport, the plane___(depart).
A.
departed
B.
has departed
C.
is departing
D.
had departed
【单选题】When we reached the pier, the ferry had not arrived, so we ___.
A.
a. needn’t have hurried
B.
b. needed not worry
C.
c. didn’t need to hurry
D.
d. need not to have worried
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