It was several years I finally realized David had lied to me.
A．when; that B．that; when C．before; that D．until; why
The report indicates that the new power station produces energy as the one built earlier.
A．twice as much B．as twice C．twice much as D．twice much
So far there is no proof people from other planets do exist.
A．how B．what C．which D．that
_____ scores of times , but he still couldn’t understand it ．
A．Having explained B．Having been explained
C．Though it was explained D．It was explained
________ their son away to college, the old couple got more room in the house．
A．As B．For C．Through D．With
_______ that Marie was able to set up new branches elsewhere．
A．So successful her business was B．So successful was her business
C．Such successful business she had D．So successful business had she
