减少了三分之二，下面的英语表述那个正确？ A: increased by two thirds B: decreased by two thirds C: increased to two thirds D: decreased to two thirds

__________ of the surface of the earth __________ covered with water. A: A third; is B: A third; are C: Two thirds; is D: Two thirds; are

of the students in our class girls. A: Two third, are B: Two thirds, is C: Two third, is D: Two thirds, are

_____ of the trees in the garden are apple trees. A: Two third B: Two thirds C: Second third D: Second thirds

________of the Grade________students are girls. A: Two third; Nine B: Two thirds; Nine C: Two thirds; Ninth D: Two third; Ninth

________of the Grade________students are girls. A: Two third; Nine B: Two thirds; Nine C: Two thirds; Ninth D: Two third; Ninth

________ the students in these primary schools is about threethousand, and ________ of them are girls. A: A number of; two third B: The number of; two thirds C: A number of; two thirds D: The number of; two third

______ of the students in our class ______ money for the disabled child.（） A: Two three; have raised B: Two third; have raised C: Two thirds; have raised D: Two thirds; has raised

Almost two thirds of the land in the northwest areas of the country................ (is, are) not suitable for farming.

Two thirds of the earth _________ covered by water. A: are B: be‍ C: has D: is