(41) .....................A.occupyB.workC.employD.staff
(40).......................A.functionB.useC.aim D.purpose
(39)..................A.toB.forC.atD.in
Why does the author mention tsunamis in the passage? A.To explain that not all tides are caused by gravity.B.To give an example of an extreme tidal phenomenon.C.C. To show that they are not related to natural tides.D.To suggest that more categories for tides area needed.
The word exerts in paragraph 2 is closet in meaning toA.mixes withB.bring into useC.infers fromD.connects with
“Why hasn’t Peter phoned? She wondered.She wondered.......................................A.B.C.D.
Which of the following does not relate to Ordinary Tides ? A.Receiving greatest influence from the MoonB.Influenced by the Sun’s position relative to the Moon.C.Taking turns the higher and lower water relating to the Earth’s rotationD.Having the striking range of tide in narrower bays
Mark the letter A, B, C or D to show the underlined part that needs correction.A large amount of popular expressions in our language have interesting backgrounds.A.A large amountB.expressionsC.have D.backgrounds.
Besides ordinary tides , how many other types of tide are mentioned in the passage ?A.twoB.three C.fourD.five
What is true about the Moon’s gravitational force ? A.It pulls water on the far side of the Earth more strongly.B.It is more than twice as powerful as that of the Sun.C.It has reduced gravity when it is lined up with the Sun and the Earth.D.Its force is strongest when it is located at 90 degrees to the Earth.
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