A.The birds ... the
B.The birds ... /
C.Birds ... the
D.Birds ... /
On a clear night you can see myriad stars ______ in the sky.A. twinklingB. glist
Modern plastics can ______ very high and very low temperatures.( )A. standB. hol
[单选题]The sun is one of thousands of( )in the sky.A.planetsB.moonC.starsD.orbits
They need air to lift their wings.Airplanes cannot-|||-fly very high because as
At a safe distance, they listened to the explosions and watched smoke ________ i
[问答题]The moon looks much bigger than any other stars in the sky.
Rainbows___________when sunlight passes through small drops of water in the sky.
[单选题]F.ly ash can partly take the place of ______.A. paving materialB. cementC. concreteD. the coal by-product
[单选题]The green kite can fly______than that red one.A.hightB.fastC.higherD.as hight
Luckily it was not moving now, and looked like an enormous (巨大的) fly __ on the b