Although we met with some difficulties in building the railway, we were still _____ about finishing it before the deadline.

As I became older, I came to like ____ things.

—May I have a look at _______ book tonight?—Of course, you can. I have ________ old one at home.

We often share the_____ goals and interests.

 This kind of exercise is most _______, and therefore is a good test of your students’ ability.