(a) We must address the problem of illiteracy in our country. (Imperative) Most of our people cannot read or write. (b) The literacy rate in Bangladesh is very poor. (Negative) (c) It is so poor that we cannot imagine it. (Passive) (d) It is the duty of the educated people to educate the illiterate. (Interrogative) (e) The government has not taken a few necessary steps to eradicate illiteracy. (Affirmative)