86. It's difficult for me to learn English.                                                          (DIFFICULTY)   …………………………………………………….…………………… 87. Students spent eight months revising for this exam.                               TOOK  …………………………………………………….…………………… 88.  What is the distance between your house and Thanh Hoa city?             FAR  …………………………………………………….…………………… 89. What is the price of these color pencils?                                                  COST…………………………………………………….…………………… 90. Is there a library in your school?                                                                (HAVE)  …………………………………………………….……………………