1. A peculiarly pointed chin is his most memorable facial ________.

A) mark B) feature C) trace D) appearance

2. John Dewey believed that education should be a preparation for life， that a person learns by doing， and that teaching must ________ the curiosity and creativity of children.

A) seek B) stimulate C) shape D) secure

3. Criticism and self-criticism is necessary _______ it helps us to find and correct our mistakes.

A) by that B) at that C) on that D) in that

4. However， at times this balance in nature is ________， resulting in a number of possibly unforeseen effects.

A) troubled B) disturbed C) confused D) puzzled

5. The patient‘s health failed to such an extent that he was put into ________ care.

A) tense B) rigid C) intensive D) tight

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