单项选择题

______ my husband and I ______ down the road yesterday evening, we heard a woman scream.

A．Since ; had walked
B．While ; have walked
C．As ; were walking
D．When ; are walking
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单项选择题
The pilot succeeded in ______ the helicopter ______ the cliff.
A．stopping; at
B．mending; in
C．flying ; on
D．landing ; on
单项选择题
I have an urgent problem and I need to call my parents, but I m afraid I haven t got ______ change-only a 10 note. Will you do me a ______
A．any ; favour
B．a lot ; help
C．some ; hand
D．a few ; support
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