单项选择题

(Despite) much research, there are still certain elements (in) the life cycle of the insect that (is) not fully (Understood) .

A．Despite
B．in
C．is
D．Understood
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单项选择题
For there ____________successful communication, there must be attentiveness and involvement in the discussion itself by all present.
A．is
B．to be
C．will be
D．being
单项选择题
The senior librarian at the circulation desk promised to get the book for me ____________she could remember who last borrowed it.
A． ever since
B．much as
C．even though
D．if only
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