--- What’s the use of this kind of fuel(燃料) ?--- It can make the train __________ fast.
I can’t go to the movies with you.I have to stay at home and________my sick sister.
The students are interested in English and they all hope________an English club.
She can play the piano________than me.
The firefighters tried their best to________the forest fire.
The first question is________harder than the second one.