问题

Three fourths of the surface of the earth ______ covered with water.
A:are
B:is
C:will be
D:was
B:is
C:will be
D:was
正确答案是:
同类题型
The Town Hall _____ in the 1800’s was the most distinguished building at that time [ ]
Peter, this is our new classmate, Tom. Could you show around the school—Sure, Mr. Green.
Sandy, please don’t tell anybody about our secret, OK— _______.
known to us all,failure usually ______ laziness while diligence can________ success.
You ______ tell Margaret — I don’t want her to know about this matter .