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

A. tell

B. when

C. left

D. saying

Câu 1: Ecologists are trying to preserve our environment for future generations by protecting the ozone layer, purifying the air, and have planted the trees that have been cut down.

A. to preserve

B. for

C. the ozone layer

D. have planted

Câu 2: He was very surprised when he visited London, in that the drivers always drive on the left hand side of the street.

A. very surprised

B. when

C. in that

D. on

Câu 3: Abraham Lincoln was a good president and was self-educated, hard working and always told the truth.

A. a good president

B. self-educated

C. hard working

D. always told the truth

Câu 4: 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 5: The puppy stood up slowly, wagged its tail, blinking its eyes, and barked.

A. slowly

B. its

C. blinking

D. and

Câu 6: 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