His conclusion, ______ on careful research, was acceptable.
A.to base B.to be based C.basing D.based
It was __________________ back home from work.
A. not until midnight did he go B. until midnight that he didn’t go
C. not until midnight that he went D. until midnight when he didn’t go
There is no reason why you shouldn’t tell the headmaster _________ that you are resigning because he has arranged your post.
A. in effect B. in fact C. in advance D. in support
It was with great joy the couple found their missing son after 18 years.
A. when B. that C. what D. which
What ______ the doctors most was that they could not find the cause of the disease.
A．astonished B．puzzled C．surprised D．amused
_____ their hats into the air, the fans of the winning team let out loud shouts of victory.
A. To throw B. Thrown C. Throwing D. Being thrown
