—Shall I lock the lab now before I go home?—______.I’ll check it myself later.
#3830
A
Go ahead
B
No problem
C
No hurry
D
Don’t bother
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— Sorry, Sir. I didn’t quite follow you.— ______. I’ll explain it to you later.
#2954
A
Don’t mention it
B
Come on
C
That’s right
D
Don’t worry
Mr. Lee, may I ask you a question? —______. 
#3113
A
It’s a pleasure
B
Go ahead
C
With pleasure
D
So do you.
—Do you mind turning on the electric fans? It’s too hot in the room. — ______________.
#53009
A
Not at all. I’m feeling cold.
B
Not at all. Just wait a minute.
C
Yes. I will do it at once.
D
Of course. I can turn it on later.