A.has witnessed
B.was witnessed
C.witnessed
D.is witnessed
[单选题]The last half of the nineteenth century( )the steady improvement in the mea
[单选题]Thelasthalfofthenineteenthcentury________thesteadyimprovementinthemeansoftravel.A.)haswitnessedB)waswitnessedC)witnessedD)iswitnessed
[单选题]H.elen loves to talk about travel. She _____ many places.A. has gone to B. has been to C. has gone for D. has been from
[单选题]The last sentence means that a knowledge of fish sounds can help man to ______.A. avoid confusion in fishing activityB. avoid unneeded effort in fish sound studiesC. detect enemy submarinesD. pick up new sounds
[单选题]Ludwig VanBeethoven,a major composer of the nineteenth century,overcame man
[单选题]Ludwig VanBeethoven,a major composer of the nineteenth century,overcame man
[单选题]Ludwig VanBeethoven,a major composer of the nineteenth century,overcame man
[单选题]Ludwig VanBeethoven,a major composer of the nineteenth century,overcame man
[单选题]Ludwig VanBeethoven,a major composer of the nineteenth century,overcame man
[单选题]In the nineteenth century,Samuel Gridley Howe founded the Perkins School fo