下列各组中的两种固态物质熔化或升华时,克服的微粒间相互作用力属于同种类型的是( )
I tried phoning her office, but I couldn’t _______.
His sister left home in 1998, and _______since.
What do you mean, there are only ten tickets? There _____ be twelve
Could I speak to ______ is in charge of International Sales please?
How much _______ she looked without her glasses!