单项选择题

When changing lanes, a driver should use his turning signal to let other drivers know ______.

A．he is entering which lane
B．which lane he is entering
C．is he entering which lane
D．which lane is he entering
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单项选择题
—Wow! You ve got so many clothes.—But ______ of them are in fashion now.
A．all
B．both
C．neither
D．none
单项选择题
The retired man donated most of his savings to schools damaged by the earthquake in Yushu, ______ the students to return to their classrooms.
A．enabling
B．having enabled
C．to enable
D．to have enabled
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