2019年mpa考试英语真题——非谓语动词1128

{01}The wreckage of something like a jet plain discovered in the heart of the desert is believed ______ a UFO and _______down for reasons still mysterious.     
A.to be; have fallen  
B.to have been; to have fallen  
C.to be; to fall  
D.having been; having fallen
解析：
本题选A。

{02}You can go and play games with your friends when you finish your homework. But remember       all the
lights when you leave.  
A.to switch off
B.to switch on
C.switching off
D.switching on
解析：
本题选A。