1.The river _______ be clean,but now it is polluted.

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1.The river _______ be clean,but now it is polluted.
2.Much of the town ________ forests now.
3.After finishing high school,he decided to go to college to______his studies.
4.The students of Class Three are wild with joy because they just _____Class Four.
5.Your help_______ me to finish the job in time.Thanks a lot.
6.They were very tired when they finally reached their_______.
7.I cannot enter my house because I have _____my keys.
8.Look,the farmers are busy harvesting the _______.

1.The river __used to_____ be clean,but now it is polluted.
2.Much of the town ___is covered with_____ forests now.
3.After finishing high school,he decided to go to college to__continue____his studies.
4.The students of Class Three are wild with joy because they just _have beaten____Class Four.
5.Your help__got_____ me to finish the job in time.Thanks a lot.
6.They were very tired when they finally reached their__destination_____.
7.I cannot enter my house because I have _left____my keys.
8.Look,the farmers are busy harvesting the __crops_____.

The river near our school u________ to be clean,but now it b the river in front of my house was ,but it's clean now.改同义句： it may now be too late to clean up the river没怎么理解选择正确答语。( )1.Will the air be clean?( )2.What time is it now?( 1.-how clean the window is!-yes.it[ ]just now. 1.This is no fish in this river because it has been polluted People are trying to make the once polluted river clean agai Now,it is 7 o'clock.He (clean) the house the water in Suzhou River is ( )clean now.a.quiet b.much c.m Look!Someone （）（clean）the room、How clean it is now!动词填空. how clean the window is.yes.it---just now.为什么用has been clean Look!Someone （）（clean）the room .How clean it is now!动词填空