We teachers must see to ________that every student can understand.
A．all B．that C．it D．one
Mary has been looking forward in the past 10 years to______the Great Wall.
A．payingavisitto B．callon C．beingonavisit D．callat
It won’t be too long before we_____a way to smooth away these difficulties.
A．work out B．willworkout
C．had worked out D．are working out
Much as he liked the book,____he didn’t have enough money to buy it．
A．but B．and C．therefore D．/
At last they got the letter they____________．
A．haveexpected B．wereexpecting C．hadexpected D．hadbeenexpecting
__________the top of the pagoda(塔),the scenery of the whole city can be seen clearly under your feet.
A．Viewing B．Viewed C．Seeing D．Tobeseen
