The bird is flying ______ the ground. [   &nb

I think the environment is really important.______, &nb The ground is very wet.        The canteen is _____________ the first floor. [&nb The film Kung Fu Panda  is _    &nb 选择合适的介词填空the kite is flying (     )a bir ______ the radio. The baby is sleeping. [   & 听对话，选择正确答案。（听两遍） 1.The eraser is     &nb He looked as if he ______ the answer. [   &nb The ice was too thin for them ______. [   &nb The teacher asked the students _______.   &nb The bus is coming. Be careful when you    &nb _____ is the most difficult of _____. [   &nb