4. Form the adjective or- ing form and complete the gaps.1)

4. Form the adjective or- ing form and complete the gaps.
1) Excuse me, but (19)__________ is absolutely prohibited here. (Smoke)
2) He is really good at (20)____________ with small children.(work) He knows how to use their natural curiosity to get them (21)_________ in learning.(interest)
3)Why don't you talk with your parents about it? They are (22) ___________ about your future more than any one else. ( concern)
4) Extreme sports may be very (23) _____________ but very dangerous too.(excite)
5) You should be very careful if you want to do mountain(24)_____________ or something of this kind. (bike)

Помогите,пожалуйста.