The police were seeking more information to find out _______the rich merchant．
A．who it was that killed B．who was it that killed
C．it was who killed D．who w as it killed
Not until he called the secretary three times ______ that the manager went to an important meeting．
A．did he tell B．he told C．was he told D．he was told
In one corner of the garden there stands a little board，_______“Keep off the grass．”
A．On which writes B．it says
C．on which is read D．which reads
—Are you still very busy？
—Yes，I ______ the report for the manager and it won’t take long．
A．have just finished B．am just finishing
C．had just finished D．am just going to finish
Are there any restaurants in Beijing _____ authentic Mexican food?
A. serve B. that serving C. that serve D. serves
_____ is expected, according to the online survey, is that prices of the houses won’t rise any more．
A． What B． It C． As D． Which
