— I can’t find my dictionary anywhere.— You _____ have lost it while studying in the library.
#87711
A
can
B
may
C
would
D
should
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Mike insisted that he ____ nothing wrong and ____ free.
#87349
A
did… set
B
had done…be set
C
do…should be set
D
had done… must be set
These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on.
#89859
A
would have been unthinkable
B
would not be unthinkable
C
would be unthinkable
D
would not have been unthinkable
 -----Why didn’t you ring me up?----- Sorry, I forgot your phone number. Otherwise, I _____ long before.
#86911
A
had rung you up
B
must run you up
C
would have rung you up
D
would ring you up