多项选择题

Using whatever cohesive device is appropriate: "Have another cake." "No, thanks, that was my third cake."

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单项选择题
Do you play basketball Not any more, but we ______.
A. used to
B. used to do
C. were used to
D. were used to doing
单项选择题
When ______ to a very high temperature, some solids will change into gases.
A. are heated
B. heating
C. heated
D. it is heated
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