【1】Reading is a good _______ (形式)of learning English.

【2】Mars is one of the _________(行星) of the sun and it goes round the sun.

【3】These boots are _________ (专门地)designed for the children under 6 years old.

【4】Meals on Mars will probably not be much ______（美味的）than they are today.

【5】More actions ought to be taken to prevent people _________(污染) the environment any more.

【6】I think the space _____ (sleep) bag is very important for an astronaut.

【7】We need to wear special boots to make us heavier because there is _______(little) gravity on Mars.

【8】There is more _______ (pollute) air in the city than in the country.

【9】The long journey on bus may be ___(comfort), but you can enjoy the nice views along the road.

【10】Always ________ (compare)with others is not good for you.