一、单项填空 在A、B、C、D四个选项中, 选出可以填入空白处的最佳选项。(本大题共14分，每小题1分)
1. — Do not give up! Perhaps ________ tough task needs more of your effort.
— I won’t. I’ll have ________ second try anyway.
A. a; a B. the; a C. a; the D. the; the
2. The tourists will find the guide book is of even ________ practical value than they thought, as it shows different routes to the places they are going to.
A. less B. little C. great D. greater
3. — Has Donnie finished reading the novel?
— Not yet. There ________ still ________ of it left.
A. is; three-fourths B. are; three-fourth C. is; third-fourths D. are; three-fourths
