he is a ___(able) boy .It is difficult for

It is great__ for a person to be able to drive when he is se it is difficult a book for us He is a boy ___(name) Tom . He found ___ very difficult to drive a car.A.him B.it is C.i it is ___ difficult for us___climb the mountains 选哪个 He is a quiet boy.(改为感叹句）___ ___ ___ boy he is! It ___ he is late for class. he thinks that it is difficult for a robot to do the same th He is so difficult boy.有错吗? the little boy has a ___ memory.so it is no __that he gets t The boy is( )brave.He is able to swim( )the river.A enough , The boy is ______brave .He is able to swim____the river.