Sure, here are the corrections for the underlined words or phrases:

1. Her (A) **fear of** (B) **the dark** (C) **dates from** when she (D) **has been** a little girl.
- **D: was**

2. Harry, (A) **alike** his classmates, (B) **is trying** (C) **hard** to finish his work (D) early.
- **A: like**

3. Without (A) **a doubt**, the best way to do well at school (B) **to keep up** (C) **constantly** with the homework and (D) **regularly** master all the class notes.
- **B: is to keep up**

4. (A) **Identical twins** are almost always (B) **of the same** sex, (C) **resemblance** one another very (D) **closely** and have similar fingerprints and blood groups.
- **C: resembling**

5. You (A) **really must** see (B) **that new** movie. We (C) **find** it very (D) **excited**.
- **D: exciting**

6. The new computer chip (A) **is** (B) **the smallest one** (C) **has ever** (D) **been developed**.
- **C: that has ever**

7. The ability (A) **to talk** is one of (B) **the skill** that make humans (C) **different from** the rest of (D) **the animal world**.
- **B: the skills**

8. Telescopes are (A) **frequently used** in astronomy (B) **to collect** light from a celestial object, bring the light (C) **into** focus, and (D) **producing** a magnified image.
- **D: produce**