Câu hỏi: About 95% of all animals are invertebrates which can live anywhere, but most, like the dtarfish and crab, live in the ocean.

A. with backbones

B. with ribs

C. without ribs

D. without backbones

Câu 1: Synthetic products are made from chemicals or artificial substances.

A. natural

B. made by machine

C. man-made 

D. unusual

Câu 2: No one knew precisely what would happen to a human being in space

A. casually

B. flexibly

C. wrongly

D. informally

Câu 3: Names of people in the book were changed to preserve anonymity.

A. reveal

B. conserve

C. cover

D. presume

Câu 4: He is over the moon about his good marks.

A. satisfied

B. very happy

C. stressed

D. disappointed

Câu 5: Unless the two signatures are identical, the bank won’t honor the check.

A. similar

B. as like as chalk and cheese

C. fake

D. genuine

Câu 6: The US troops are using much more sophisticated weapons in the Far East.

A. difficult to operate

B. expensive

C. complicated

D. straightforward