单项选择题

—Have you found your pen yet —No, I am not sure ______ I could have done with it.

A．whether
B．where
C．when
D．what
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单项选择题
For thirteen years after his return from Europe, ______.
A．the Chicago Daily News was worked for by Carl Sandburg
B．Carl Sandburg’s work for the Chicago Daily News
C．when Carl Sandburg worked in Chicago for the Daily News
D．Carl Sandburg worked for the Chicago Daily News
单项选择题
Weather ______, the picnic will be held as scheduled.
A．permits
B．should permits
C．will permit
D．permitting
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