Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
A smile can be observed, described, and reliably identify ; it can also be elicited and manipulated under experimental conditions.

A. smile

B. identify

C. can also

D. experimental

Choose the option among A, B, C, D which needs correcting to make a complete sentence

(A) After writing it, the essay must (B) be duplicated by the student himself and handed (C) into the department secretary before the end of the month.

A. After writing it

B. be 

C. into

D. the end of 

Choose the option among A, B, C, D which needs correcting to make a complete sentence
Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can get to its root causes and fĩnd cures.

A. is helping

B. so

C. that

D. its

Choose the option among A, B, C, D which needs correcting to make a complete sentence

Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can get to its root causes and fĩnd cures

A. is helping

B. previously

C. so

D. that

Choose the option among A, B, C, D which needs correcting to make a complete sentence.

The computer-based tests will test your ability to understand spoken English, to read nontechnical language, and writing correctly

A. will test

B. spoken

C. writing

D. correctly

Choose the option among A, B, C, D whIch needs correcting to make a complete sentence
The novelist Shirley Hazzard is noted for the insight, poetic style, and sensitive she demonstrates in her works.

A. The

B. for

C. sensitive

D. demonstrates

Choose the option among A, B, C, D whIch needs correcting to make a complete sentence

The novelist Shirley Hazzard is noted for the insight, poetic style, and sensitive she demonstrates in her works

A. The

B. for

C. sensitive

D. demonstrates

Choose the option among A, B, C, D which needs correcting to make a complete sentence

The camp on the inhospitable, (A) mosquito-infested banks of the River Sekonyer, was (B) set up to track the primates and (C) learn from their habitat, (D) diet and behavior

A. mosquito-infested

B. set up

C. learn from

D. diet and behavior