30． Why can fish swim in the water? Jack's answer is ________ ．

A．fish can't walk on land

B． fish can- t swim on land

C． fish can-t walk in the water

D．fish has no legs or hands

[单选题]Fish can't live ______ water.A.withB.withoutC.inD.on

[单选题]30. --- Can you tell me when _____?--- About two weeks ago.A． does he buy the car B. did he buy the carC． he bought the car D. he buys the car

[单选题]30． Mike can't mend _______ ．A． his kiteB． his shoes and kiteC． his chairD． his door

[单选题]18．1 can _________ swim _________skate． Will you teach me how to swim and skate?A． not only，but alsoB． both，andC． either，orD． neither，nor

[单选题]—why, Jack, you look so tired!---Well, I _____the house and I must finish the work tomorrow.A． was paintingB． will be paintingC． have paintedD． have been painting

[问答题]While water can carry a boat, it can also overturn it.

[单选题]A．s mentioned，“grey water”can be used to______.A．wash the carB．water the gardenC．clean the toiletD．dispose of wastes

[问答题]You can buy water inside.

[单选题]Ballast water can only be（）in cargo tanks in exceptional cases where the particular character of the operation of an oil tanker renders it necessary to carry ballast water in excess of the quantity required，provided that such operation of the oil tan

[单选题]30．A．playB．playingC．playsD．plaies