You should keep national flag（飘扬）____.

A．flew

B．flown

C．flying

D．flies

[单选题]National flag should not be（卷叠）_________.A．rolling upB．rolls upC．rolled upD．roll up

[单选题]You should work for __________ if you become an editor of the magazine.A． just nine hours a dayB. no less than nine hours a day C. about ten hours a dayD. less than 25 hours a week

[单选题]Laws have been written to govern the use of American National Flag, and to

[单选题]Laws have been written to govern the use of American National Flag, and to

[单选题]Laws have been written to govern the use of American National Flag, and to

[单选题]Laws have been written to govern the use of American National Flag, and to

[单选题]Laws have been written to govern the use of American National Flag, and to

[单选题]_____you may have, you should gather your courage to face the challenge.A． However a serious problemB． What a serious problemC． However serious a problemD． What serious a problem

[试题]B．eforeyoumailthisletter，youshouldcheckagainwhetheryouhave_______itornot.A.sunkB.sighedC.soughtD.sealed

[单选题]Keep practicing and you _____ your English.A． improve B. will improve C. improved D. were improving