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

I have searched ________ for the book but couldn’t find it.

The traffic problems have severely affected economic development. ________, we must spare no efforts to solve them.

If what your friend comes up with surprise you, don’t reject it immediately. _____, imagine that it is true.

Tell your brother to come _____, because it's going to rain in a minute or two.