I SPENT HALF AN HOUR WRITING THIS LETTER.A. IT TOOK ME HALF AN HOUR...

3. - KIEM TRA 45 PHUT N1 HKI 20122013
KIEM TRA 45 PHUT N1 HKI 20122013

3. I spent half an hour writing this letter.

a. It took me half an hour to write this letter.

b. I wrote this letter half an hour ago.

c. half an hour was a short time for me to write this letter.

d. I should write this letter in half an

hour.