Câu hỏi: The plants and animals of the sea fall into three major groups.

A. small

B. chief

C. minor

D. main

Câu 1: It is easy to open a shop but hard to keep it always open.

A. welcome

B. appear

C. switch

D. close

Câu 2: It's cool and quiet everywhere except in the kitchen.

A. windy

B. freezing

C. cold

D. hot

Câu 3: Use water sparingly and keep water clean.

A. dusty

B. dirty

C. wicked

D. halfway

Câu 4: He had never experienced such rudeness towards the president as it occurred at the annual meeting in May.

A. thought

B. hostility

C. care

D. politeness

Câu 5: Fish only species that are not of concern, threatened or endangered.

A. educated

B. healed

C. defended

D. brought

Câu 6: Last night they stayed at home and watched TV.

A. day

B. noon

C. midnight

D. morning