Question

—Do you know ______?—Yes. She is doing her homework.

A．what is your sister doing	B．what your sister is doing
C．when your sister is doing homework	D．where is your sister doing homework

Answer 1

B

考查點(diǎn)：考查賓語從句以及句意。解題思路：賓語從句用陳述句語序，根據(jù)答句：是的，她正在做作業(yè)，可知問句句意：你知道你的姐姐正在干什么嗎？故選B。