The man was so surprised at _______ that he did not try to escape or defend himself.
A.discovered B.discovering C.to be discovered D.being discovered
It is estimated that the number of tourists who travel abroad ______ in the past decade.
A.have doubled B.have been double
C.have been doubled D.has doubled
I ______ her to the party but I didn’t get her phone number.
A.had planned to invite B.have planned to invite
C.planned to invite D.was planning to have invited
I guess your failure in the exam ______ inadequate preparation.
A.results in B.results from C.caused by D.causes
I ______ video games when my parents suddenly ______ back home.
A.was playing; came B.was playing; was coming
C.was playing; had D.had played; came
The president promised to keep all the board members _____ of how the negotiations were going on．
A.inform B.informing
C.be informed D.informed
