ⅰ.单词拼写 1．as chinese________(公民)，we should try our best to improve the environment. 2．bikes are very popular in china.many people prefer________(骑自行车)to work. 3．scientists have been trying to find ways to________(预报)earthquakes. 4．the increase in the population of plants can stop the process of________(沙漠化)． 5．it's________(可怕的)to be outside in a sandstorm. 6．there's a lot of________(尘土)on the floor. 7．i don't have the________(力气)to climb any further.
