John learn French and Spanish at the university. He is good at French, but can’t speak the fluently.
.He pretended _______ nothing about it.
. Little Jim should love _______ to the theatre this evening.
. They would not allow him _______ across the enemy line.
. There are so many kinds of tape-recorders on sale that I can’t make up my mind ____to buy.
. Charles Babbage is generally considered _______ the first computer.