—Why do you look so worried?
—My computer broke down and my essay ______ unfinished since.
A.was left | B.has left | C.left | D.has been left |
.He pretended _______ nothing about it.
A.know | B.to know | C.knowing | D.Knew |
. Little Jim should love _______ to the theatre this evening.
A.to be taken | B.to take | C.being taken | D.Taking |
. They would not allow him _______ across the enemy line.
A.to risk going | B.risking to going | C.for risk to go | D.risk going |
. There are so many kinds of tape-recorders on sale that I can’t make up my mind ____to buy.
A.what | B.which | C.how | D.Where |
. Charles Babbage is generally considered _______ the first computer.
A.to invent | B.inventing | C.to have invented | D.having invented |