Câu hỏi:  This young tree could not have been damaged by accident: I believe it was done __________.

A. in fact

B. on purpose

C. by appointment

D. by understanding

Câu 1: The workmen made so much ______ that Mr. walker had to spend three days cleaning up afterwards.

A. damage

B. mess

C. nuisance

D. destruction

Câu 2: Unless the workers’ demands are ______ soon there will be a strike.

A. met

B. paid

C. permitted

D. replied

Câu 3: Excessive smoking is liable to cause ______ cancer.

A. chest

B. lung

C. heart

D. rib

Câu 4: Their walking-tour through Lapland never came _______.

A. on

B. off

C. out

D. round

Câu 5: She heated the chocolate until it ______ , then poured it over the cake.

A. changed

B. melted

C. floated

D. flooded

Câu 6:  The farmer had to wear heavy boots in the winter because the fields were so wet and _______.

A. earthy

B. dusty

C. greasy

D. muddy