I will be surprised if you can get Calvin, who is very busy, ______these tickets for you.
#91848
A
buy
B
buying
C
buys
D
to buy
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The workers want us ________ together with them. 
#98791
A
work
B
working
C
to work
D
worked
— I must apologize for _____ ahead of time. — That’s all right.
#93958
A
letting you not know
B
not letting you know
C
letting you know not
D
letting not you know