It’s uncertain _______ side effect the medicine will bring about , although about two thousand patients have taken it ．
A．that B． what C． how D． whether
--Sorry, I have to _________ now． It is time for class．
--- OK, I’ll call back later．
A． hang up B．break up C．give up D． hold up
Written in a hurry , _____________． Which one of the following is right ?
A．they found many mistakes in the report B．Sam made lots of mistakes in the report
C．there are plenty of mistakes in the report D．the report is full of mistakes
The lost car of the Lees was found ___________ in the woods off the highway．
A．abolished B．abandoned C． resisted D．rejected
---Can those _________ at the back of the classroom hear me ?
A．seat B．sit C．seated D．sat
----He is fluent in English because he once stayed in London ．
---- Really ? How long _________ there ?
A．did he live B．has he lived C．had he lived D．does he live
