Though some foreign scientists had a ______ opinion of his new invention, his fellow workers never thought ____ of it.

 ------What do you think of our design for the new car？------Pretty good. But I find theirs is _____ worth considering and studying.

One thing that most organically grown food products seem to have in common is that they cost more than ________ grown foods.

   So far the young man hasn’t had any success; ______ he will keep trying.

Although China has developed its economy greatly, its per capital GDP is still         one-tenth of the United States.