The time he has devoted in the past years _______ the disable is now considered ________ of great value.
—How come you still work here? I hear your company has bought a new office building. —But the newly-bought building_______ .
It is becoming more and more difficult to_______the problems of traffic in some big cities of our country.
She thought_______impossible to finish so much work in a day.
.—I’ve told her many times, and she still forgot about it! —I understand. It’s true that she_______be very forgetful sometimes.
My mother made a promise_______I passed the examination, she would buy me an MP4.