赞题库-背景图
单项选择题

A.Because female wasps transmit diseases.
B.Because male wasps do not leave the nest.
C.Because female wasps are bigger than males.
D.Because female wasps have stingers.
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单项选择题1（）

A．straightforward
B．noticeable
C．deprived
D．reference
E．relatively
F．recognized
G．accused
H．impression
I．illustrating
J．slight
K．attempt
L．undergoing
M．reliance
N．consequently
O．inexplicit

单项选择题A.To protect the nest. B.To lay eggs. C.To gather food. D.To replace nest cells.

A.To protect the nest.
B.To lay eggs.
C.To gather food.
D.To replace nest cells.