They were so __________ about joining the local volunteer group that they couldn’t sleep last night.

Knowledge of word form

A. excite /ɪk’saɪt/ (v): excited

B. excitement /ɪk’saɪtmənt/ (n): excitement

C. exciting /ɪk’saɪtŋ/ (a): interesting

D. excited /ɪk’saɪtɪd/ (a): excited

* Distinguish:

Excited – used to express the feelings of the subject (usually a person)

Exciting – refers to the nature of things

Last night they were so excited about joining the local volunteer organization that they couldn’t sleep.