Many scientists believe that life begins in the ocean long ago. For age man used

Many scientists believe that life begins in the ocean long ago. For age man used the ocean to discover and explore new lands. Now man spends a great deal of time or money discover the ocean. We know it is rich at minerals which the world need. We know too that it contains a plenty of food for all the people in the world. We know that if the salt were taken from it, it’s water would turn the deserts into rich farm lands. We know a great deal about this land frontier, as it has called. But we still need to learn many more about it.

试题答案

【小题1】begins---began

【小题2】age---ages

【小题3】or---and

【小题4】discover—discovering

【小题5】at---in 

【小题6】need---needs

【小题7】it’s---its

【小题8】a plenty of--- plenty of

【小题9】has---has been

【小题10】many---much

解析试题