皮皮学，免费搜题
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搜题
【单选题】
以下宽带接入技术中，()属于光纤接入。A.
Wimax
B.
xDSL
C.
xPON
D.
HFC
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Every day we should keep our classroom _________. [ ]
A.
cleaning
B.
to clean
C.
clean
D.
cleans
【单选题】We should always keep the classroom ________ and tidy.
A.
cleaning
B.
cleaned
C.
to clean
D.
clean
【单选题】Now the environment in city is ______ than it was before. We should keep it clean. [ ]
A.
much better
B.
more worse
C.
more better
D.
much worse
【单选题】We should pay attention to _______ the city clean.
A.
clean
B.
cleaned
C.
cleaning
D.
to clean
【单选题】We should ______our classroom and keep it tidy and clean.
A.
set up
B.
clean up
C.
cut up
【单选题】We should _____our clsaaroom and keep it tidy and clean.
A.
set up
B.
clean up
C.
cut up
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