—Youlookverypale.You__________verytired.—Ididn’tsleepatalllastnight.
A、mustbe
B、musthavebeen
C、canbe
D、canhavebeen
A、howcanIfinishmyhomeworkontime
B、howIcouldfinishmyhomeworkontime
C、Icanhowfinishmyhomeworkonthetime
D、howIcanfinishmyhomeworkontime
合理预期学派认为，造成经济波动最根本的原因是预期失误，这种失误来自()
A、统计数据误差
B、统计方法不合理
C、信息不充分
D、政策失灵
AnA4sizedpanel(太阳能板)putontothebackofajacketcosts__________US$15.Itcould__________acellphoneduringasummerwalk.
A、atmost;work
B、atleast;control
C、atleast;fuel
D、atmost;charge
Generally,theweatherinBritainis_____toocoldinwinter_____toohotinsummer.
A、notonly,butalso
B、neither,nor
C、either,or
D、both,and