In 1913 Edison developed the synchronization of pictures and sound,____（）
A. so opened the way for talking motion pictures
B. thus opening the way for talking motion pictures
C. to open the way to talk motion pictures
D. opening the way to talking motion pictures
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____, the wire becomes longer（）
A. Heating
Being heated
C. To heat
D. Having heated
“Can’t you read!” Mary said,____ to the notice（）
A. and angrily pointing
B. angrily pointed
C. pointing angrily
D. and pointed angry
I like getting up very early in summer. The morning air is so good ______（）
A. to be breathed
B. to breathe
C. breathing
D. being breathed
____ waiting for Jane, he headed home（）
A. To feed up with
B. Feeding up with
C. Fed up with
D. To be fed up with
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