1)Complete using the infinitive or the -ing form. Which countries are you interested in ... ? 2)Complete using the infinitive or the -ing form. I don't know where (1)... or how long (2) ...? 3)Complete using the infinitive or the -ing form. I'm too frighten ... 4)Complete using the infinitive or the -ing form. I don't know what....
1) Which countries are you interested in visiting? 2) I don't know where (1) to go or how long (2) to stay? 3) I'm too frightened to speak. 4) I don't know what to do.
Which countries are you interested in ... ?
2)Complete using the infinitive or the -ing form.
I don't know where (1)... or how long (2) ...?
3)Complete using the infinitive or the -ing form.
I'm too frighten ...
4)Complete using the infinitive or the -ing form.
I don't know what....