23. It is said that a bridge is being built _____ the river.
| A．under | B．to | C．over | D．At |
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 |
Muchashelikedthebook,____hedidn’thaveenoughmoneytobuyit．
| A．but | B．and | C．therefore | D．/ |
Atlasttheygottheletterthey____________．
| A．haveexpected | B．wereexpecting | C．hadexpected | D．hadbeenexpecting |
__________thetopofthepagoda(塔),thesceneryofthewholecitycanbeseenclearlyunderyourfeet.
| A．Viewing | B．Viewed | C．Seeing | D．Tobeseen |
WhenIvisitedthecityofRome，Ifoundthebuildings，squaresandparks_____________inverydifferentstyles．
| A．tobedesignedandbuilt | B．todesignandbuild |
| C．designedandbuilt | D．designingandbuilding |