There is no doubt ______ he said at yesterday’s meeting was true.
The time he has devoted in the past years _______ the disable is now considered ________ of great value.
The discovery of new evidence led to________
—________ is the best football player in your city? —Jerry.
Though they had not much to say, they email each other _____ .
I demanded that he _____ English to help him improve it gradually.