__youacceptouroffer,pleasecableusorourconfirmation.
A、Until
B、Unless
C、If
D、As
Youcantakeanyseat____isfree.
A、inwhich
B、that
C、where
D、which
Thereason____(为什么这事情会这样)isnowclear.Idon'tneedtoexplainitoncemore.
Itisimperativethatyou____hereintime.
A、shallarive
B、mustarrive
C、couldarrive
D、arrive
A、reserveameetingroom
B、orderrefreshment
C、findacomputer