Câu hỏi: Conservation is the safeguarding and preservation of nature resources.

A. is

B. safeguarding

C. preservation

D. nature

Câu 1: She wishes that we didn’t send her the candy yesterday because she’s on a diet.

A. didn’t send

B. her the candy

C. because

D. on

Câu 2: Please tell us the reason when he left without saying goodbye.

A. tell

B. when

C. left

D. saying

Câu 3: Slowly and with care, the museum director removed the Ming vase from the shelf and placed it on the display pedestal.

A. with care

B. from

C. placed

D. the display pedestal

Câu 4: The deadbolt is the best lock for entry doors because it is not only inexpensive but installation is easy.

A. the best

B. because

C. not only

D. installation is easy

Câu 5: Narcissus, a character in mythology, gazed at his own image in a pool so ardently that he fell into itself and downed.

A. a character in mythology

B. his own

C. that

D. into itself

Câu 6: Unless there had been a heavy storm, the climbers will not have died.

A. Unless

B. had been

C. heavy

D. will