We offered him our congratulations ___ his passing the college entrance exams.
She ____ to us that those eggs which are ____ on the table had been ___ by snakes.
________ something wrong with the machine, I am afraid.
.He voiced a doubt at the company meeting ______works hard can be______they want to be.
The farmers needed________agricultural technology. Therefore, ________skilled workers were sent there.
.------Can I get you a cup of coffee? ------________________.